32 bit pretty much kills it for me. I've got the 1176 UAD. It's 32 bit but it came as a freebie with a UA Solo card that was a free rebate with my UA 710 mic pre. I think I probably have another one as a free VST possibly. I don't keep track of that sort of thing.
IIRC, I watched a video with Chris Lord Alge where he said that Waves came and copied his favorite 1176 in his collection. He had several of them (maybe a half dozen) and he had one that was the best of all of them. The others didn't sound as good as this one. That tells me that there is a variation from hardware unit to hardware unit. So if I'm an unlucky schmuck that only owns one 1176 and it's not a good one, I might not even know that. So if I hear a software emulation of a one, how would I know if it's a good emulation or not?