@pointers of course it is, they can just use #matrix and be de-siloed.
corporations aren't going to be nice about it and use a federated protocol. #GOOG tried it and found that they only bled users and subsidized competitors.
the only real solution to "i want to use one protocol/system to talk to all of my peeps" is free/open protocols run by non-corporate entities.
you can not like my proposed solution, but i'm not wrong.