It started collapsing around 2012, when Adobe decided not to update the database functionality and removed it from the program, leaving extension developers to make that functionality available for an additional cost. They then scrapped DW's Code View engine and added the open source Brackets code engine to it, losing a ton of functionality and personalization settings in the process. It's been pretty much down hill ever since, with odd bolt-on whizbang feature additions, followed by almost all of it being removed again. Adobe announced in 2020-21 that DW was going to be put into a Minimum Development Status, no new features, no bug fixes, just updates to third party bolt-ons and potential security and OS compatibility patches. Design View hasn't been updated since before you stopped using it, though they made some real strides with the Live View Editor before giving up on the program and leaving it to wither on the vine. It's much closer to an actual browser, but no emulator will ever beat the real thing(s) when it comes to browsers. Personally, I'd collect my things and ask for a refund from any school "teaching Dreamweaver" as anything other than a coding tool at this point. It's disappointing.
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