How is this an argument against Signal and/or centralization? Pretty much the exact same thing could have happened with matrix 3pid servers.
I really like Matrix (and Signal), I use it and even run a public Matrix home server, but jesus I can't stand obnoxious Matrix fanboys who feel the need to shoehorn some Matrix plug into literally every conversation involving Signal.
Because all of those users are exposed by the same SaaS fault. Too many digital eggs in one digital basket.
What is there to plug? It's FOSS. Use it, or don't, who fucking cares? Whether you or anybody else use it or not is of absolutely zero consequence to me.
I really like Matrix (and Signal), I use it and even run a public Matrix home server, but jesus I can't stand obnoxious Matrix fanboys who feel the need to shoehorn some Matrix plug into literally every conversation involving Signal.