[piva00]

It had the potential to be a great replacement if it just worked™ like SMS/MMS (well, MMS was also quite fickle back in the days), given it's so brittle across devices even on the same OS, with little means of troubleshooting by end-users and even less from non-tech savvy users, it's kinda dead in the water.

[issafram]

Not dead in the water at all. By default, it is enabled for all Android phones and iPhones

[jhbjkkhhh]

Not true. My carrier only enables it when you have a Samsung phone. I have an iPhone, so no luck.