Long answer:
I had (and still have) hopes for VST, but it was not a decision maker. I upgraded to get new RT's, but mainly for 64bit version, to show my support, as I see this as a huge step in the right direction. For me, VST is still very young and underdeveloped and I expected it to have issues

I was reading a post from P.G. a few days ago. It seems he/they do have bigger plans for it. To be fully useful for me, it has to be: Stable, Respond to
ALLbar changes, holds etc. from SGUs created in BIAB, intuitive and fast (has to be faster than now). I hope (and believe) we will get there. Hopefully within reasonable time.
Short answer: No, I did not buy BIAB 2019 strictly for the VSTi