So I just recently updated my MBP to Windows 10, only to find out it looks like the Intel HD driver doesn't have proper OpenGL support yet - forcing AM to use the 'Microsoft GDI Generic OpenGL implementation' - non-hardware accelerated. I can barely get layouts to load, and if they do it's rather slow.

If you are looking to use 10, might want to double check driver support for OpenGL.
Here's the error I receive:
Warning: Detected "Microsoft Corporation GDI Generic" OpenGL implementation
The current OpenGL implementation is not hardware-accelerated
Setting vertical sync not supported
Failed to create texture, its internal size is too high (2048x1024, maximum is 1024x1024)
Impossible to create render texture (failed to create the target texture)
OpenGL extension SGIS_texture_edge_clamp unavailable
Artifacts may occur along texture edges
Ensure that hardware acceleration is enabled if available