I understand your point, but I don’t think there’s any value in including an extra layer of abstraction before you need it. Sometimes it’s clear that you need it from the start. But sometimes it’s not.

And if you end up needing to support something sufficiently different from what can fit into wgpu’s API, the right point of indirection might just be the rendering system. E.g., you might just write a separate renderer for the new platform, so you can write to its model in the most efficient way.