With Vulkan and Metal, X-Plane is now firmly in the driver's seat for VRAM management. This lets us eliminate stutters that were previously present with OpenGL and almost impossible to avoid. It has, however, one big and noticeable downside: when you run out of VRAM, you get blurry textures.
Of course the goal wasn't to replace stuttering with blurry textures, and we believe that given the normal work load of X-Plane, you should not be seeing this. The fact that so many users are seeing blurry textures, especially on big cards with lots of VRAM, points to the VRAM code being buggy in all the ways beta code can be buggy.