Not AMD doing the work, but 14 year old GCN 1 / 1.1 has been getting a bunch of modernization & other improvements. R9 290, HD 7970, many more old chips. https://www.phoronix.com/news/AMDGPU-SI-Power-Management https://www.phoronix.com/news/AMD-GCN-1.1-Driver-Default-Pro...

AMD might not be doing the work, but they set the world up to be able to support their chips. I'd take that over crossing my fingers for ok Windows driver support to hold out any day.

Top range of these cards had (only 8GB) of 0.3TB/s memory, which is what a modern 9060xt can do. Double that for the 9070xt, but still not bad. 4->~48 (fp32) TFLOPS though, wow! Especially with a modern driver stack. With the accelerators all using much older architectures I wonder if they stand to get any benefit, not that they're getting used for graphics much.

Thus can never be viable. Instead, the companies should open-source obsolete products allowing community support.