Yeah I have to say I don't get it at all?
If Vienna released the VEP plug in as native Apple Silicon, they could make a strong argument for new customers to purchase VEP7 to run plug ins on their old machines as VEP slaves, that currently do not work in M1 macs.
Currently it seems that the plug in works as an x86 under Rosetta, but it's mixed results. The MAS version doesn't work for instance.
I just think it's weird, I would think getting the plug in version of VEP out quickly would be a priority, but I don't know the mechanisms at place.