I did hear back from my inquiry to Luxion, they are testing now with a couple of kinks to work out. Turns out that if the plugins were written in C++ they are fine, and even most Python scripts are ok, they just need a recompile. Since COFFEE environment in Cinema is no longer supported, those are all gone and have to do a complete rewrite, but very few plugins were written there.
Most major vendors are completing their rewrites fairly quickly. Greyscalegorilla updated all theirs, with the exception of Signal, and Nitroman's are all C++ so most of those already work. the excellent CV-Pack from Cineversity is good to go too.
I just got the email that X-particles is good to go, but too bad it leaves my license of version 3.5 in the dark. I can't justify to upgrade it as i don't use it for my current job, but is my favorite plugin to use. So much fun. I hope they share their bridge tech for other developers, that would be great.