Moving from WhatsApp to Signal is an important action, right now. WhatsApp’s parent company, Meta, has been involved in several cases of election interference: America in 2016, Trinidad and Tobago …
But to be fair Mail is pretty centralized too nowadays for most people @gmail and @outlook. Of course there are others but my point is that there a a hand full of providers up to a point that it’s almost unfeasible to maintain and run you own mailserver because there is a high chance that those large providers will flag your mail as spam because it’s rare to see a “wild” mailserver.
But to be fair Mail is pretty centralized too nowadays for most people @gmail and @outlook. Of course there are others but my point is that there a a hand full of providers up to a point that it’s almost unfeasible to maintain and run you own mailserver because there is a high chance that those large providers will flag your mail as spam because it’s rare to see a “wild” mailserver.