All the B2C services I work with are sending SMS to my phone. Not RCS, not iMessage: they are sending SMS messages.
All the MFA providers, such as Twilio and Okta, are sending SMS.
All the political campaign spammers are sending SMS.
All the reminders for appointments and bills are sending SMS.
All the notifications for apps where Push isn't good enough: they're sending SMS.
If user-to-user communication is using iMessage then that is fine. I have noticed that only about 2 of my human contacts use RCS, and at least 2 of them are using iPhones and not Androids for it. So that's some anecdata for ya!
That's interesting; I have and use discord myself (owner of a 300+ member server for my WoW guild), but I've never really considered it a messaging app in the same way I do iMessage, WhatsApp, and so on. I think because everyone is pseudo anonymous, it's more like social media to me. Plus I've got the phone numbers and iMessage groups for close friends I've made over discord.
Given its popularity among gamers of all nationalities, I wonder where discord stacks up in relation to the EU's DMA?
(I just really don't like Discord and I'm bitter that it's what my guild de facto has to use because it's what gamers have standardized on.)
iMessage?
> 40% of Americans are not using [iMessage]. I'd consider that widespread.
That doesn't mean those 40% are using SMS instead.