I was at some of these worldcons at the time and where it may not have been bloc voting, it was definitely voting for people over stories. And I'm talking open discussion of voting for effect rather than story quality. Worldcon attendance around 2012 was heavily skewed older and I might say a hippy vibe.

Sad puppies at least was completely honest about it. I don't agree with what they did, but it's honest. Everyone's pretending like they're voting for things nobody has read because they read them and not because the author has been "blessed" as appropriate for accolades. Also, not saying it should be a strict popularity contest.

Also, 2000's looks pretty normal and it doesn't seem to kick off until 2010+.

I could be convinced, though. It's hard to pick out a book from the last 15 years which which will be on the read list 30 years from now. Except The Three Body Problem, which I loved and I think will last.

So, I'll check back on this in 30 years and see how it's aged.