More accurate headline: open source software gets updates to support 22 year old AMD GPUs.
However, finding a vendor who would do that will prove to be an impossible task
That said, I'm sure you could pay Collabora or some shop like it to implement any features for these old drivers that you really care about.
Everyone who still uses these GPUs probably doesn't require "more speed" (or they would have upgraded already)
However, as long as people have fun fixing (and testing) new features or improvements to these old drivers, why not?