[romshark]

Shouldn't such old standards like SMS just die?

I didn't write or receive any SMS for like 5 years now (except some confirmation codes) since encrypted messengers became so common and accessible.

I think it's obvious that SMS is outdated either way and I too think that encryption should be P2P on the "application layer" for many reasons. Encrypting the actual physical transport would add extra cost in terms of latency and hardware and could become a maintenance disaster over time if I'm not mistaking.