I tried it and it’s pretty nice indeed. But while I could convince my familie and friends to use Signal, there is no chance that they will use SimpleX. It’s too unknown and “techy” for most of them.

Last time I used thunderbird was many years ago, like 10 years or so. Can you create a mail adress there? How does it compare to other providers like Tuta, Proton, Posteo and others?

Doesn’t Matrix have a huge problem with metadata or am I not up to date with this?