Yeah, it is not impossible, but you are actively going against the maintainers choice of software and configuration, that they can assume you have during every update. That is what makes Arch so popular: no handholding that would get in your way; but also no helping hand from upstream, only documentation how to do it. Cinnamon is maintained by the Mint team and considered difficult to install anywhere else. IMHO when you are used to KDE, it can feel lacking.