I also assumed that I was the exception to the rule and went strictly mastodon where I assumed most people use multiple social media sites.
I think the more solidified those relationships are, the more likely someone is to leave. Even so, the flip side of that question is, isn't interacting with / joining threads pretty much running back to them anyway, if not in a slightly milder sense?
@PersistentDreamer
@Mastodon
And that is precisely the reason a lot of instance admins, including myself, are blocking them by default.