This is an email I received from @isaiah last month. I don’t think he would object to my sharing parts of it:
It’s a tough decision. I thought I would just be able to turn it around quickly, but a reliance on a very specific older version of a library that was available on Intel Macs but not on M1 Macs makes this decision much more difficult. I spent a couple months working on porting the library, but it’s from a very old and long forgotten branch that itself requires many esoteric libraries. It is, in other words, a nesting russian doll of work – with no guarantee that I will find the center anytime soon.
For that reason, the official line is: it’s undetermined. Please keep using Rosetta for the time being.
If it does come back, it will likely require a paid upgrade to cover some of the months of time put in to bringing it back. Unfortunately for me, none of the loghound plug-ins ever comes close to breaking even – so it’s always something I have to do with my spare time as a gift to the RW community.