@Gargron
Mastodon is only one of the elements of the #fediverse, there is more efficient #Pleroma (and allowinger longer msg), #Pixelfed or #Anfora for pictures, #PeerTube for videos (and audio/w picture), #FunkWhale for audio only, #Plume, #WriteFreely & other for full blog, #ForgeFed for source code/#Git projects, #Diokeli for #research papers, #Mobilizon for events. All are united by #ActivityPub protocol, and some by #Zot6 too.