There are some long threads on another BIAB user list where people are asking these 2 questions below and it seems that no one from BIAB can answer these 2 questions--

1. Has BIAB 2019 program really been totally rewritten as a 64-bit program
or did PGM figure out a kludge to wrap the old 32-bit code (or
is much of it still 16-bit?) is it some sort of a wrapper so that it
interacts with other software as a 64-bit program but internally still
32 bit? Sort of like j-bridge serves as a 64-bit "wrapper" for 32-bit
plug-ins so they can be used with 64-bit DAWs.....or has the BIAB 2019 been completely rewritten in native 64 bit code without shortcut wrappers.....question 2 below is associated

2. With the new 2019 BIAB VST feature-- the rendering takes a lot longer in DAW's in both Ableton and Presonus Pro in multiriff mode and in general with the generating. Why does the rendering take a lot longer in the DAW's and why is it faster in the BIAB standalone. Some are saying because BIAB 2019 is not true native 64 bit. I for one as many do-- appreciate fast render times and being able to quickly stay in the creative zone and not have excessive render times.