Signups are currently 50k+ people a day, and probably about half of the people I follow on Mastodon are people of a totally non-technical background. It may feel high effort to people, but it's not something which requires any more technical understanding than getting past the "what the heck is an instance?" issue, and I've seen people get comfortable on Mastodon before even understanding that and then had it click once they there.

That said, the proportion of people making the move who also want to set up a crossposter might well be much more technically inclined.