Regarding the whole Fediverse/Threads debate:
Shunning someone because they're using Meta products is little like shunning someone in 1975 for using the Bell System. Facebook and Instagram are that pervasive, especially for people who are older and poorer users. People use those products because they have to.
Meta is a monopoly, but at least Bell in 1975 was heavily regulated. Meta is more arrogant than Bell ever dreamed of being.
"We don't have to care. We're Meta." (snort)