Longtime Linux user who switched to Ryzen 1500x recently from an old Core i7 (2011 model). As far as the processor goes, I have faced no problems w.r.t stability. Paired with an ASRock motherboard, there are no problems with other functionality such as suspend/resume either. Occasionally the Desktop compositor hits a snag freezing my machine and requiring a forced reboot, but I would fault the NVidia drivers for this.

Also, since I use the Arch distro, installing packages from the AUR requires compiling stuff. So far ffmpeg has been among the packages with large source code base that I compile regularly and I've never had issues. I would like to compile the kernel too, but I'm unsure as to whether the difference will be noticeable for my daily usage. On my old machine, the Zen-kernel did improve responsiveness, but on my current one, I'm sticking to the LTS kernel.

Word is that the 2nd generation of Ryzen a.k.a Raven ridge are more stable and worth it if you can afford them (watch out for motherboard compatibility though).