Observation: people from the current #TwitterMigration are mostly folks who had Twitter accounts pre-2010.

Or at least, those are the folks who talk to me.

@atomicpoet 2007 here. Twitter seemed much easier and more intuitive, tbh. Or maybe its changes came about gradually. I'm still unable to find many of the accounts I search for, and can't follow from inside a different server.
@KathyF Are you including their domain name in your search (ex: @[email protected])?
@atomicpoet I think the problem with some of them was not having the initial @ sign. Others worked without it though.
@KathyF Yeah, that's a tiny thing, but does require getting used to.