From the PR, it sounds like the switch to WGPU is only for linux. The team was reluctant to do the same for macOS/Windows since they felt their native renderer on those platforms was better and less memory intensive.
Yes, but they can add a flag to switch renderers on startup like they had for blade.
> they felt their native renderer on those platforms was better and less memory intensive
This definitely would be worth some profiling. I don't think it's a given that their custom stacks are going to beat wgpu in a meaningful way.