I think shared hosting there is more meant to refer to the older “upload your files in webmin and we’ll shove them in /cgi-bin/ with everybody else’s”-style hosting where multiple users sites are running on a single instance of a webserver versus a VPS giving you a VM with SSH access?
“What is your favorite self-hosted application?” had what looks to be about 15 matrix responses.
Would potentially be interesting to see Matrix/XMPP/etc prevalence in future surveys, maybe replacing ‘what activitypub apps’ with a more generic ‘what federated apps do you self-host’