Others have brought up the DAW issue, but I think that’s probably the main reason.
You can have everything you want in a DAW, which makes limitations more valuable.
It’s a bit like the idea of synthesized Scotch. Imagine if we could perfectly synthesize any Scotch. Want to drink (quick Google) 50 year old Balvenie? No problem. The ingredients cost the same as gut-rot whiskey, so punch a few buttons and you’re sipping $50,000/bottle Scotch. In fact, you can make better Scotch. The machine can scan your DNA and synthesize a flight of Scotch that will feel like inappropriate metaphors in your mouth!
Doesn’t seem that great, does it? The minute anyone can have $50,000/bottle Scotch, nobody wants it, and now the “real thing” costs 10x as much, even though it’s completely identical. People will pay so much more for the “experience” of drinking completely identical Scotch out of an “authentic” bottle.
Similarly, I bet part of the reason we’re still playing synths modeled after 80s sounds and guitars designed in the 50s is that for many people the authenticity is worth more than the actual sounds. Because if you want to make new and original sounds, all the tools you need are waiting for you in your DAW.