I’ve looked at the stuff over the years, but really don’t like how fickle all of it seems (ie using a specific install of CataRT with a specific install of FTM) and the fact that it means you can’t share work with others who don’t have the externals.
Thankfully they’ve made their copy protection more sensible (at least that’s my understanding), as otherwise that would be a deal breaker too.
Some of the tech stuff seems really exciting/interesting (supervp), but the cons outweigh the pros for me.