I say Reason has sadly been cut off from my workflow because I love using the rack so much. I started on Reason 4 when I was a freshman in high school and have kept upgrading ever since, long after I abandoned the Pro Tools license I purchased at the same time. Despite the fact that Reason hasn't fit into my workflow in ages beyond using it as a standalone source for eventually printed audio to be brought back into my main DAW I've still continued purchasing tons of REs in the hopes that something like the Rack VST would happen.
I make music for video games/film/TV for a living, using Reaper as my main DAW. Sessions tend to be fairly large, track count/plugin count/RAM usage/multiple slave PC wise. I did not expect Reason, as a DAW, to make the leap to the level of administration/utility of Reaper (or even Logic, which I used to use before I freed my mind and moved to Reaper

I've always had trouble in Reason organizing and navigating the Rack even in only moderately sized sessions. Now I'll be able to order each individual rack as a separate unit in Reaper, not only for instruments but for FX chains, too!! So, SO stoked.
At this point you're probably all thinking:
So! Long story short: I could not be happier with this update, it literally brought a tear to me eye when I woke up yesterday and read the news. Does that invalidate all the disappointment many of you here seem to be feeling? Not at all, just wanted to throw my opinion out there.