Harald, Thank you for all your insights you shared with us. That was, as always, very helpful.
There were also some comments on Mastodon https://mastodon.social/@kirschner/105971769095775615 by user Vondralbra
@kirschner I feel #RCS is a dead horse... - if it is operated within a network operators network it is subject to lawful interception in every country of the world; so there canˋt be E2E-encryption by design - if they might use the legal gap with OTT then there might be E2E-encryption but the messages pass Google servers and Google collects all the meta-data. No, thanks... - the universal profile is the minimum set of features between all operators. Other messengers are far more advanced.
@kirschner If RCS would have been pushed by ALL network operators worldwide in 2012 and if there would have been a clear pricing model it could have succeeded. But nowadays, I don‘t believe in it anymore...
Best regards, Matthias