You should be able to choose with your wallet or whatever you're paying with - your self in this case - but for communication classic server-client structure do

You should be able to choose with your wallet or whatever you're paying with - your self in this case - but for communication classic server-client structure does not offer that option because you have to rely on the choices of the rest of your contacts. That alone is enough to support alternative solutions. Yet, it's really funny how so many on HN, the vanguard of startups among news aggregators, rather continue to fanboy Musk than engage in brainstorming opportunities the Fediverse and ActivityPub offer.