Really curious how this improves the filesystem bridging situation (which with Docker Desktop was basically bouncing from "bad" to "worse" and back over the years). Or whether it changes it at all.
I'm just taking a wild guess here, but I'd guess it's not a problem - WSL2 works afaik by having a native ext4 partition, and the Windows kernel accesses it. Intra-OS file perf is great, but using Windows to access Linux files is slow.
MacOS just understands ext4 directly, and should be able to read/write it with no performance penalty.
I would imagine it is low lift - using https://developer.apple.com/documentation/virtualization/sha... which is already built into the OS
If they wanted to improve the situation they would’ve needed to ship an apfs driver and a Linux kernel. Sadly they didn’t.
AFPS isn't the solution since you can't have two kernels accessing the same FS. The solution is probably something like virtio-fs with DAX.