Is it realistic that the maintainers and firms in charge might manage an effort
to solve this matter across vendors this year?

I unfortunately always notice the performance issue by simply browsing the web,
as even little text or hyperlink pop ups trigger fps drops, which are not there
without atomic modesetting on Xorg.

I personally would already be quite happy if the experimental patchset was
available e.g. in amd-staging-drm-next branch for the time being.