Tangentially, this was surprising
The system prevents you from mixing
arm64 code and x86_64 code in the
same process. Rosetta translation
applies to an entire process,
including all code modules that the
process loads dynamically.
I've been using this VST from Arturia (Minimoog V) since they distributed it for free back in like 2011 or 2012, and it runs as well on my M1 Mac as it did on my previous Intel Macs.
I mean, it's literally the same DMG from way back when and there's no chance it doesn't run under Rosetta, but I run Ableton natively!