Interesting argument. I'd be curious if you know roughly how many plural people there are (let's say headcounts as there's only one body) compared to Discord's user base. (150 million active users per month according to random half-assed google search)
But your point was that this is actively keeping people on Discord? By extension, that must mean that a significant bulk of those 150M users are kept on Discord because it has PluralKit. How do you reconcile that with the group of plurals being, apparently, quite small? To the point where even on Beehaw/Lemmy almost nobody seems to even have heard of it.