> A fair few local orgs use facebook exclusively for communication.

I noticed that when vaccine availability in the US was constrained during the first few months of 2021 and local governments were organizing vaccination clinics, several of the events were announced only on Facebook pages. Several towns/counties didn't seem to have websites, or didn't put the events on the ones they had, instead preferring to announce them on Facebook.

It was scary to think that folks locked out of Facebook for whatever reason did not have access to those notices unless informed by a friend or family member.