I gave up on J-bridge. Only because I don't really need it and I had some problems with it. I'm only on one Windows 64-bit for the most part. The Linux machines are all 64. The box in the music room has my 32-bit installs on it also, so the old plugs are there. I record odds and ends on this box too and I do processing and conversions. I can boot into two other 64-bit, if I want 64. I don't seem to be making special trip to 32-bit just to use those old plugs, though : )
I don't buy a lot of plugs, anyway, but there's more plugs than we can shake a stick at, so it might be hard to really justify the 32-bit ?
Good luck with Blockfish !
(for the most part my DAW are bridging their old stock plugs, it seems)