Lightroom Classic worth it?

I can understand not wanting to do a subscription, but you should know that the subscription Lightroom Classic is a fully functional desktop application, no different in functionality from a non-subscription version. The photography plan Adobe offers is 9.99/month and includes Lightroom Classic, Photoshop, and a new application called Lightroom CC (yes not smart to name it the same as the old Lightroom) that stores all images in the cloud if you use it but has only a fraction of the features you expect from Lightroom(I don't recommend that but some folks like it). That's a steal in my opinion compared to perpetual licensing. Again if you absolutely need to own your software that's not an option but you should still think about it.

RSHPhoto  wrote I have Lightroom 5…what does Lightroom 6/Classic offer

Here's the web page where Adobe lists everything in the Lightroom 6 releases.

Feature summary for Lightroom CC 2015.x/Lightroom 6.x releases

The bulk of the feature differences between 5 and 6 are at the bottom of that page, for Lightroom 6.0. A few more features were added in point updates, but read carefully because those features were typically added only to the Creative Cloud version of Lightroom, not to the Lightroom 6 perpetual license version. The perpetual license version did continue to get bug fixes and updates for new cameras and lenses.

You can upgrade to Lightroom 6 for $79. There were 14 updates. There were new cameras that were supported in each of those updates. Lightroom 6 had a few new features added, but features that were added to Lightroom CC (the subscription version) were not added to Lightroom 6. Lightroom Classic CC is a subscription version, but it isn't what you might consider a "cloud" version. It installs on your computer, runs on your computer just like Lightroom 5 does. You can share images in the cloud IF choose to do so, but that is your choice. Lightroom Classic CC is subscription only, $9.99/month in the US, and that includes the latest Photoshop as well. The programs install locally on your computer, run locally on your computer just as they always have.

If you choose to upgrade to Lightroom 6 you should be aware that after you install the program and update to Lightroom 6.14 to get support for all the new cameras supported by that version, that would be the last update you will ever get for that program. There will be no more updates for Lightroom 6. Lightroom Classic CC is still being supported and updated and new features will expectedly be added as time goes by.

There is another version of Lightroom now, Lightroom CC. It IS a cloud version. Images are stored in the cloud and made available on the computer and mobile devices with a very similar interface on all of those devices. It's your choice whether or not you use that version. If you choose the Creative Cloud photography plan you can download both versions and choose for yourself which one is more suitable for your particular needs. It is not advisable to try to use the two versions together.

Lightroom 6 and Lightroom Classic CC are NOT the same program. Lightroom Classic CC is still being completely supported and has a number of features that Lightroom 6 does not have. It has the ability to share images in the cloud IF you choose to do so, and that comes at no extra cost with Lightroom Classic CC. If that has no interest to you then you don't have to use it.