It certainly looks as if RM is being left behind.
I’ve beeen looking closely at EndNote, which is having regular updates.
It imports my RM database succesfully, and has some neat features, but there are some RM features which I would miss.
Still…
Given that T-R must have limited resources, I can see the sense of having just one program, but why not manage the transition properly - add the missing features to EndNote, then offer a cheap cross-over license…