@atomicpoet Exactly.
Whilst some instances may restrict or ban certain functions, that doesn't mean one can't implement it.
In fact, I know some folks do #SelfHosting of #Mastodon due to extensive blocklists by other instances, and they want 100% control.
Only #MultiVendor / #MultiProvider & #FLOSS - based #Standards can provide that.
That's why #OpenStandards don't die out:
Regardless if Telephony, Fax, SMS, eMail, XMPP, IRC, SIP, SSH or OpenVPN.