ive built an instance (https://moist.catsweat.com) specifically with en eye on helping people off-board! im going for a generic, reliable 'home base' that people can then get to the fediverse content of choice.
with all this de-federating nonsense goin on, i think its important we build reliable off-ramps to those giant platforms... but of course you cant help people achieve that if you dont interoperate with their old platforms.
you are absolutely correct, this whole thing is still wet behind the ears. the fediverse still has serious interoperability roadblocks... the AP standards in practice are all over the place. it helps that some brands are rebuilding their twitter footprint on their own fediverse instances.