Here's what I wrote about the software connotations of "Classic" on the old Photoshop Family forum 3/24/2018 (see the attached PDF for a prettier printout):
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"Classic" has a wide range of meaning, and it often means traditional, elegant, revered, etc. But in the context of software and the Web, it is very often used to connote end-of-life, superseded by a newer product, outdated, old fashioned, no longer available, legacy technology, supported but no more improvements, hard to use, not the preferred product, etc. -- as just a little time spent with Google reveals. Why would marketers choose a name fraught with such connotations?
Examples:
Adobe Acrobat Classic
https://en.wikipedia.org/wiki/Adobe_Acrobat
"Updates for the Classic track are released quarterly, and do not include new features..."
Google Classic Maps
https://techforluddites.com/classy-gmap-update/
"Last year when Google killed off their Classic Maps program and replaced it with a much less user-friendly option missing a bunch of key features..."
https://www.searchenginejournal.com/google-to-shut-down-classic-google-maps-will-introduce-new-lite-...
"Google to Shut Down Classic Google Maps, Will Introduce New Lite Version"
Google Classic Sites
https://www.lifewire.com/brief-guide-google-web-hosting-3473732
"Google launched Google Sites in 2008 to serve as a free web hosting solution for Google users, similar to Wordpress.com, Blogger and other free blogging platforms. The company received criticism regarding the difficulty of working with the original Sites interface and as a result, in late 2016, Google's overhauled Google Sites went live with a redesign. The web pages created under the original Sites design are designated as Classic Google Sites, while the sites created under the redesigned Google Sites are identified as New Google Sites.
"Both are fully functional, with Google promising to support Classic Google Sites web pages at least through 2018."
"The new redesigned interface promises to be much easier to work with. Although you can still work with the Classic site for a couple of years, and Google is promising a migration option for moving from Classic to New, if you are planning a new website with Google, it makes sense to use the redesigned New Google Sites."
Microsoft Classic ASP
https://classicasp.site/classic-asp-support/do-you-need-support-for-your-older-legacy-software-and-w...
"Legacy website support such as Classic ASP, Umbraco 4 and 6..."
Classic Mac OS
https://en.wikipedia.org/wiki/Classic_Mac_OS
"The 'Classic' Mac OS[4] is a graphical user interface-based operating system developed by Apple Inc. for its Macintosh family of personal computers from 1984 until 2001"
Desktop App Converter
https://thenextweb.com/apps/2016/04/08/microsofts-releases-tool-converting-legacy-software-modern-wi...
At Build 2016, Microsoft announced the Desktop App Converter, a tool that would allow developers to convert classic Windows programs into modern Universal Windows Platform(UWP) apps. ... While the tool won’t magically make legacy apps look like modern ones...
Novagem Solutions
http://www.novagemsolutions.com/en-us/services/moveyourclassicdesktopoperationonweb.aspx
We move your classic desktop application on Web. Novagem Solutions allows companies to revalue their investments ... even if these are based on legacy desktop platform.
Windows Mobile 6
https://en.wikipedia.org/wiki/Windows_Mobile
"It comes in three different versions: 'Windows Mobile 6 Standard'for Smartphones (phones without touchscreens), 'Windows Mobile 6 Professional' for Pocket PCs with phone functionality, and 'Windows Mobile 6 Classic' for Pocket PCs without cellular radios"
Basecamp
https://basecamp.com/help/2/guides/account/switch-classic
"When you're ready, it's easy for you to move your Classic projects into the new and improved version of Basecamp."
BlueNote Communicator Classic
http://www.bluenotesoftware.com/news/lights/
"Classic has all of its class; it is just not the 'flagship' product any more."
Dynix Classic
https://librarytechnology.org/repository/item.pl?id=12736
"...it came to be accepted as a strong alternative for public libraries that were moving away from their aging Dynix Classic systems."
Loch Ness Productions
https://www.lochnessproductions.com/legacy.html
"Legacy / Classic: Loch Ness Productions got its start in the traditional (now "classic") planetarium medium. ... But, the bits and bytes of computer technology eventually rendered the old slide projector and film equipment passé."
Prezi Classic
https://prezi.com/support/article/steps/prezi-classic/
Times change, and so does technology. That’s why Prezi is now Prezi Classic to make room for our newest software, Prezi Next. We’ve streamlined the best elements of Prezi Classic and added a host of new capabilities so you can create next-level presentations that visually pop and captivate your audience. While you can still use the same version of Prezi that revolutionized the way the world does presentations, we would like to introduce the next big thing in presenting.
Infosphere Classic Federation Server
http://www.lookupmainframesoftware.com/soft_detail/dispsoft/1764
"Categories: Legacy Application/Data Access + Databases...Access mainframe databases"
Salesforce Classic
https://automationchampion.com/2017/09/13/migrating-from-salesforce-classic-to-lightning-experience/
"The Lightning interface provides a more natural user experience than the familiar Salesforce Classic. ... Indeed, with every release, Lightning Experience is getting better and better."
Paypal Classic Site
https://www.google.com/search?biw=1280&bih=1265&q=paypal+classic+site+&oq=paypal+classic...
Anyone who has used Paypal for accepting business payments has experienced the horror of watching Paypal remove useful functionality...