I know what you mean. The requirement is that friends and family will use it, too.
How long ago was your experience with matrix?
switch from Whatsapp to Element (matrix)?
Donald Trump just saved Mette Frederiksen from electoral oblivion
Ghent museum refuses return of Nazi-looted painting
Germany's fight over 'lifestyle' part-time work
France's lawmakers vote to ban social media for under-15s
Germany's Green Party under pressure over Mercosur vote
This all sounds very promising. Especially that they cannot unilaterally change the standard and that they have stable and high-volume clients. I'll put together a list of client-side messengers implementing matrix.