Blender now works on the large majority GPUs that our users have. We have found workarounds for dozens of those bugs, which has been very time-consuming. However, we have found that there are many graphic cards that support OpenGL 3.3 in hardware, but have critical bugs in the OpenGL drivers. The original plan for Blender 2.80 was to work on all GPUs that have OpenGL 3.3 drivers and were released in the last 10 years.
