This blog post is somewhat late. Roughly two months ago, the OpenGL function glGetString started causing segmentation faults on ARMv7 devices using Mesa for 3D acceleration. Devices using Mesa for software rendering seem to be unaffected. On affected devices, this results in programs like Xwayland and X.Org segfaulting on startup, and Phosh showing the "Oh no" screen but otherwise working fine outside of X11 apps being broken. Other Wayland interfaces may or may not work depending on how they handle Xwayland startup.
This issue is being tracked at aports#14140 and pmaports#1651.