I've been using linux mint cinnamon for a few months but a few days ago I decided to try endeavourOS. Since the switch I experienced a few crashes where the screen went black and then login page showed up and after getting back my opened apps were all closed. Today I also noticed that my apps pinned to the task manager/bar also got unpinned but I'm not sure at which point that happened. I heard that linux has problems with nvidia GPUs so maybe it has something to do with it?
Been rock solid for years for me. Daily driving Wayland for over a year, butter smooth experience apart from minor Plasma 6.0 woes with complex multimonitor setups. AMD graphics.
If you're on NVIDIA you probably want the latest beta proprietary drivers which fixes a bunch of Wayland issues (which Plasma 6 defaults to), or switch to an Xorg session for now.
Cinnamon doesn't support Wayland at all, so you must have been using an Xorg session on Mint, that should work well for you on Arch as well with Plasma.
The option should be on the login screen.
Wayland's still a bit hit or miss unfortunately, but when it works it's really nice and NVIDIA's drivers are finally catching up. It's a radical new approach to graphics on Linux compared to Xorg, so it's got some growing pains but also does solve real problems as well like VRR and HDR and vsync on multimonitor setups. Pick whichever works best for you.
The bleeding edge can have some sharp edges. Stable distros mostly hold those changes until it's more ready to their standards, whereas on rolling distros you get shiny new things, for better or for worse.
The funny thing is I'm already on X11 because when it launched on wayland I couldn't do anything because of messed up resolution. It was very low and most of the interface was outside the screen and while trying to troubleshoot what's going on I found this switch on login page and was using X11 ever since. I have 4 monitors connected to my pc and my main one is a FullHDUW monitor and second one like that on top of it. For some reason the second monitor is always visible to the system even though it's turned off but I didn't knew at the time so I haven't tried disconnecting it to see if it was the fault.