@mike brings up a compelling argument for the #fediverse in a historical analogy with #aol: all the innovation around, say, travel in the closed AOL system back then could only come from AOL and whatever they could think up. It took the protocol-not-platform-centric decentralized web to catalyze the much broader innovation we’ve seen since, e.g. AirBnb is hard to imagine having been invented inside a closed system like AOL.
@mmasnick agrees with the innovation argument: just copying the closed internet platforms, as (so far) much of todays fediverse is doing is not particularly interesting. But we don’t really know yet what amazing new inventions we will see.