I moved to Linux over 25 years ago and I miss absolutely nothing.
The joy of not having to update your OS when Microsoft forces it, even whilst you're working, or the way Apple still cannot do window tiling despite decades of examples on how to achieve this, or installing applications and finding files splattered all over the file system with no way to remove them except manually, or the endless user agreements, licence fees, expiring licensees, or the notion that you cannot run a new OS on an old machine that's in perfect working order.
So, no, it was the best decision I've made.
I wish that I'd made the same good decision when it comes to my accounting software.
It has. I use it everyday. It's shit. Apple keeps moving windows to different desktops without user interaction, I can't snap windows to each other, full screen takes over a whole desktop and ESC inside such a window puts it back to some random state.
Better Touch Tool did a better job a decade or so ago.
and creates it. It's a whole new workspace just for putting an app in fullscreen and none of the shortcuts to jump to workspace x work with it of course.
The rest of the WM can be made bearable but there's no way around that stupid design choice.
When you install a package, it keeps track of all the files so when you uninstall it, it removes them all. There's various ways to scan and remove untracked files, but on a Linux system you can basically be ask it "where does this file comes from?" and it'll just tell you "oh, that's from mpg123, and you have it installed because VLC and Firefox need it to decode some AVIs". And if you really don't want it for some reason, it can also go uninstall everything that needs it too.
It makes it pretty hard to corrupt a system or uninstall important stuff. In the reverse, it also knows what is needed, so if you install VLC, it will also install all the codecs with it, and those are also automatically available to other apps too usually.
While that is true for the files that make up the programs themselves and their dependencies, it's not true for any state files or caches that programs creates at runtime. You need to clean those up manually.