Mint is 95% Ubuntu LTS. That means it is a stable base, used in maaany companies, for servers etc.
Linux Distros are a puzzle of packages.
Just in my experience, especially desktop linux struggles a lot with instability and development.
In my Experience, at least KDE Plasma on Ubuntu base was always horribly unstable. But I want to stay with Plasma :D
Linux Mint also has their own desktop, forked from GNOME 2 or 3 idk, because they didnt like what they did. A lot didnt like it, Budgie, Cinnamon, Mate are the same here.
And as GNOME is still the biggest Desktop on most distros, that says a lot about the state of these “protest desktops”.
I have the feeling Mint has an extreme difference between “how much is it used and recommended” and “how much is it developed”, unlike many other projects.
They are doing kinda fine (no idea when they will ship with Ubuntu 24.04 LTS) but they also simply dont really change much.
All these old Desktops base on a big huge core, XOrg, handling all the display, input, output etc. That is made for terminals and mainframes, is fundamentally insecure and just got patched and patched over the years to support things like multiple screens.
As XOrg is not really maintained since years, Wayland really is the new alternative.
Wayland is waaay better, just still incomplete for some use cases.
Any Desktop without Wayland support is unmaintained and insecure. XOrg is not magically patched by some mint developers.
GNOME, KDE Plasma and some window managers have good wayland support. COSMIC, a very cool new alpha-stage desktop, is wayland only.
Cinnamon does its own thing but I have no idea how they want to compete with GNOME, KDE Plasma and now COSMIC. Every desktop does its own thing (they dont need to but do anways, reading code is less fun than writing code).
And once the core component is unmaintained, Desktops with less developers are struggling hard.