The primary reason is its a shit protocol - they’ve had 20 years to make a protocol that competes with existing protocols, it’s still problematic, and it’s still dependent on a phone number/SIM.
It was designed as a replacement for SMS, just bringing some of the features from SMS alternatives like iMessage. It was never designed to compete with alternatives.
Part of the reason I refuse to use RCS.
The primary reason is its a shit protocol - they’ve had 20 years to make a protocol that competes with existing protocols, it’s still problematic, and it’s still dependent on a phone number/SIM.
It was designed as a replacement for SMS, just bringing some of the features from SMS alternatives like iMessage. It was never designed to compete with alternatives.