Why would you use that feature? MacOS doesn't REALLY have multiple desktops (Spaces). That is merely a pre-release feature (for 10 years or so, I think). As evidenced by the many critical user journey bugs it has that don't get addressed.

I use both linux (with a decent tiling window manager; the tiling management being the least important part of it) and macos. And certain things are just not possible to do with macos. On linux I can have 300+ open terminal windows AND CAN find the one I need when I need to. On macos 20 (counting in Termianl tabs, which are implemented as windows, underneath) is about the high mark that it gets annoying to work on. On macos, you can't effectively work on multiple projects that use the same software (editor + terminal, for example). You can work with different Applications, though, and that is managed pretty well (better than most linux window managers that I have seen).

Every year or so I try adding a couple of Spaces, and always regret it a couple of hours later, switching back to a single Space (+ a few fullscreen apps).

I've used spaces since 2013, they work well enough. The animation bug is annoying though. On displays higher than 60Hz, the animation is slower because they made it frame-based instead of time-based, or something silly like that.

I love the three finger gesture to move between them though, it's like moving pieces of paper around. You can also work around the bug I mentioned by swiping faster, but yeah I wish they'd just fix it so we can move on.

Of course it can be used. But it is very buggy (as in missing or not well-though-out behaviors), which is unlike the typical polish Apple human interaction folks deliver. For example switching between Spaces and then between apps and windows and creating a new app window don't work as expected in some combination of steps and for some apps. There are several other "corner" cases that show the features were not laid out in a full design to exhaustively decide the desired behavior in each case. Which is very much like when someone bolts on a feature to a system without fully nail down its interaction with all other adjacent and relevant features.

I'm just responding to your "Why would you use that feature?" question. I use it because I like it, and it works well for me. I'm not disagreeing that they have some bugs and design issues to work out. It seems pretty obvious MacOS doesn't get as much attention as iOS when it comes to these things.

Spaces help me visually organize related apps. I have all my chat apps in one, all my dev stuff in another.

I used to run Linux with i3 tiling window manager, but switched to Mac because the battery is so much better. Although the new Framework laptop looks like it has pretty great battery life.

Doesn't excuse it but in case you or other readers are unaware, there are some ways to mitigate it: https://arhan.sh/blog/native-instant-space-switching-on-maco...