As a rescent convert coming from Ubuntu to cachy os, the update cadence of an arch ibased distro, is something to get used to. It is also one of the main reasons behind experimenting with it. I am.using ubutntu and debian for work related workloads, where stabiloty is more important than having.the latest software. For personal use and playing around, cachy has been awesome. You control your own cadence.with updates. I am doing weekly at the moment, or whenever I need some new piece of software.

These improvements are for MESA, by an open source developer for Valve. So not in the AMD driver itself. Older AMD cards do well on linux, because AMD open sourced the driver and incorporated it in the kernel. My AMD experience on linux thus far has been that it just works. Valve is spending a lot of resources on improving the graphics stack on linux.