How did you actually pick your auth provider?

I have been comparing a bunch of auth and identity providers over the last few weeks, and I keep running into the same feeling, which is that after a while they all start to blur together. The landing pages promise more or less the same things, the feature lists look almost identical, and the pricing pages all seem built to be a little hard to compare. So I am genuinely curious how people cut through that. For those of you who chose one and shipped with it, what made the decision in the end? Was it the quality of the docs, the pricing, one specific feature you could not get anywhere else, the support you got while evaluating, or simply someone you trust telling you to use it? I really need a real reason, please.