I would say "Done thinking YC is the right fit for me" could be more accurate.
Of course, now they've flagged the thread, so not sure if any of this discussion matters. Instead of cancelling the discussion, it should be actively promoted.
I am not accusing of YC doing anything explicitly. I think they make the right decisions when it comes to what you need in a young team in order to succeed. An example of this is the multiple founder bias. Right on point. Young people are just not equipped for the brutality entrepreneurship can deliver.
I also think that some of their process results in unintentional age bias. Asking for age is one example. Older founders might not need or want co-founders. And relocation is something might be impossible as well. As an example, in my case, I have full industrial-class manufacturing capabilities where I live. Moving to YC for three months, quite literally, means I would be far less efficient and likely get very little done. Or, I would have to abandon work on hardware and focus solely on software.