LoopMash’s origins are in a research project between Yamaha and the MTG of the UPF in Barcelona (University). That was later developed into a product by Steinberg, Yamaha and MTG. Knowing some things about research projects and cooperation in general, questions regarding the rights to the products might be one factor in play here, besides some technical issues.
Effectively, it is indeed a shame. LoopMash is somewhat unique in what it does and how it does it - there are various beat slicing tools out there, but they cannot do what LoopMash can achieve for the most part. I did use it a lot, but for a number of stability issues less so in the recent past - which is a pitty, there hasn’t been an update in around 10 years. If it could get an update to remove some of the quirks it would still be a great and valuable tool.
Well, at least I got it running in N12 (even incl. presets) and play again with it.
I second the thoughts on the other 3 synths, those are based on the Tera engines by VirSyn, and VirSyn did shift their focus to iOS completely a couple of years ago. No updates to the desktop instruments for years, so VirSyn was most probably not interested in updating the code and Steinberg was forced to discontinue them.
Did anyone use “Sonote Beat re:edit” back then? It looks like a tool somewhat similar to LoopMash, but with a single layer and using a database of loops instead more lanes. According to this New VST plug-in by Yamaha based on a previous joint research with the MTG - MTG - Music Technology Group (UPF) it might or might not be somewhat related to it under the hood.
Cheers.