> If Rosetta2 goes away, Parallels support for x64 VMs likely goes away too.

Rosetta 2 never supported emulating a full VM, only individual applications.

You're right. It looks like the new full VM emulation in 20.2 doesn't use Rosetta.

https://www.parallels.com/blogs/parallels-desktop-20-2-0/

Nevertheless, running x64 software including Docker containers on aarch64 VMs does use Rosetta. There's still a significant valid use case that has nothing to do with neglected software.

Edited my post above. Thanks for the correction.

The OP only applies to Rosetta for running x64 Mac apps, not running x64 Linux software in aarch64 Linux VMs.