The only thing in the public domain about elite numbers are Delta’s comments (I think that Diamond’s have doubled) but they made it considerably easier in COVID due to rollovers. They also have a unique lounge problem due to the Amex partnership.
UA’s only public comment is that they are keeping the thresholds unchanged for this year. I think they are trying to imply that they are comfortable with the numbers whatever that may mean.
UA controls the taps so the CPU and PZ/PN space will simply go where they like regardless of the numbers. Like many I suppose my experience seems to be that when flying from hubs half the plane is 1K whereas from outstations I might be the only one.
Long winded way of saying no one knows and it probably doesn’t even matter anyway.