I may have found a way to use plugins that are normally unstable under GP, namely Sampletank 3 and ArtsAcoustic BigRock.
Sampletank 3 causes occasional GP crashes, and BigRock crashed GP every time when trying to load it.
So I tried bridging the 64 bit versions of these plugins using JBridge, and so far I’ve seen no crashes.
Hopefully this is a fix. Time will tell.