What's the story with OpenGL on macOS? I know it is abandonware in favor of Metal but are there reasons Apple will at least keep it in the OS / drivers for foreseeable future? Do any of the ANGLE type things help when they finally take it away?
AFAIK ANGLE (and MoltenGL) only provide GLES2.x and GLES3.x over Metal, so out of the box those wouldn't be very useful for providing desktop-GL compatibility.
Apparently Zink on top of MoltenVk on top of Metal works, but that looks like a Jenga tower of emulation layers.
Ideally, Apple would rewrite their OpenGL framework on top of Metal (if it hasn't happened yet), and keep that working at least into the 2030s.