Seriously, you have to realise this is about migrating from Messenger. Messenger, from Facebook. Any doubts about the "dubious claims" of Telegram are completely overshadowed by the definitive certainty that Messenger is extremely privacy invasive.
Also, the Telegram experience is simply stellar throughout, performing brilliantly even under harsh network conditions. Signal just offers an insanely bad user experience.
> Signal just offers an insanely bad user experience.
I don't agree with the claim that Signal has superior UX over Telegram, but it's definitely not insanely bad either. It has some rough edges, and it's desktop client is not that fully featured and doesn't look that great, but otherwise it's a perfectly fine app that my mother can use without problems and without specific instructions.
That's leagues above, say, Riot, or IRC, and I feel that "insanely bad UX" really paints the wrong picture.
Also, the Telegram experience is simply stellar throughout, performing brilliantly even under harsh network conditions. Signal just offers an insanely bad user experience.