Actually you're not far from the point there, I've only been using vst's for the last couple of years 4 at most and I'm still not convinced that it was actually an use. The fact that it's never been fully implemented is the biggest problem.
I regularly use izotope products and they mostly work acceptably within Reason DAW, however I also use some Mixed in Keys stuff and although they function the biggest floor is the complete lack of midi support and although there are workarounds they are mostly in affective.
Given the state of vst support in Reason I would rather they didn't bother at least we could have continued to share project files without the problem of who's got what plugins. Now we've got them I just want them to finish fully implementing it for vst2 before they even offer vst3 as what's the point if it's only half working!