I'm going to make a bold prediction, but I think at some point within the next 2-3 years you'll see one of the incumbent commercial social media services white-

I'm going to make a bold prediction, but I think at some point within the next 2-3 years you'll see one of the incumbent commercial social media services white-labeling their application for organizations, much in the same way Gmail, Google drive, Google docs, etc is white-labeled as G Suite. It will probably implement the necessary federation protocols (ActivityPub) and provide an on-ramp to the fediverse for those not looking to "self-host" per se.