I dropped both Signal and Simplex, and tried 'most', secure messenger in favour of the federated #chatmail messenger Delta Chat.
I, like @keith, will not suggest you 'move' all your contacts to it, nor will I claim it to be the 'best'.
What I will say though is, after many year's investigating options in the Secure Messenger category, I really like pretty well everything about it and, more importantly, have managed to get the important people in my life to also adopt it.
And, to me, after decentralisation, this was the Holy Grail...
