Goes the other way around too: Linux will only have a good desktop environment when it's users will be willing to leave it.
Putting aside the debate as to the quality of desktop environments, I honestly hope you're being intentionally nonsensical as a joke. What you describe can only make sense under the grossly misinformed belief that "Linux" is a monolithic entity incentivised to stop its users from "leaving it", and that this mythical "Linux" would have the agency to decide it needed "a good desktop environment" in order to avoid that from happening.
Windows is designed by a committee that tries to do as little as possible and has ulterior motives higher on the priority scale than UX. Like marketing copilot and other Microsoft subscription services. Microsoft software is always aimed to be just good enough for the users to not choose something better. They love just coasting on their marketshare without doing much to improve. Like they did with internet explorer and now do with office.
have you used GNOME?
If you're a lifelong KDE user you might not have used GNOME in a while and seen how it's gotten.
I haven't been in the GNOME settings for years.
I use macOS and Linux, and the way GNOME works makes switching between them easier for me than when I run KDE, for instance (I'm sure others have a different experience, and that's what is so great about Linux).
Death by thousand cuts. I'm moving back to Gnome and ideally away from wayland too. The thing as simple as secret management (for git and keys) is just one of these things....
I hate their opinionated design and I love settings so I use KDE. I love that. That's the good thing about Linux. Everyone can use it as they like. Unfortunately there seems to be some pressure to unify things to make it more for "the masses" but I will not play along with that for sure.
When is Windows going to get a good desktop environment?