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.