CachyOS has a pretty good development team and combine that with Plasma that has it’s own development team I’d say it’s in good hands. Compare that to cinnamon which is like one dude and once you get into the nitty gritty of it you quickly find how lacking it is.
One example, if you’re on a laptop and use a lot of public wifi (I do for work) you deal with captive portals A LOT to connect. on Cinnamon/Mint it was an absolute headache to try and get those things to pop up and connect. It was more of a Cinnamon issue than anything else.
on CachyOS with Plasma I don’t have that issue. It tells me that I need to connect to a portal and will open it and connect to it for me.
combine all that with Arch and it’s just a breeze. everything you need is right here: aur.archlinux.org and this applies to all Arch distros. it’s essentially a database of everything you can install on an Arch distro. no need to go googling stuff, it’s all right there. combine this with Octopi (package manager) it makes it way better than Mint IMHO.
And if you have Nvidia you’re doing yourself a deservice by staying on Mint. I think the most you can use on it is the Nvidia 535 drivers. anything above that you’re going to crash Mint. on Cachy i’m on the 555 drivers and my games have easily doubled their FPS. I can play Elden Ring and Helldivers 2 on maximum settings and pull down 90+ fps. games like WoW or FFXIV i’m getting over 100 FPS. On Windows I’d get maybe 30 to 40 FPS on the exact same rig.
The main reason I switch to Cachy was because of the development team. I was also planning on checking out Nobara but again, it’s one guy, so I felt more confident going with Cachy.