Being excluded from a group chat has a huge social impact for younger people.
People in America don't use WhatsApp. There's no reason for me to switch when none of my friends/family/contacts have it.
> How often does someone whine so loudly about insisting on using the closed, Apple-proprietary protocol that their friends need to pay a monthly subscription for a third party interop app?
Enough that people don't date people who use Android
It's not that simple, you get discriminated against for having a different color bubble and using up people's SMS allocation.
We should whine about (communication) interoperability, it's critically important for everyone. Purposefully or negligently creating incompatibilities is anticompetitive and generally toxic.
It's really not about either. It's about UX. SMS and MMS message UX is terrible.
I agree that encryption in transit and rest are important, but there are open and verified solutions like Signal. It seems like extremely poor security hygiene to take Apple's word that their closed-source chat service is actually secure as they claim for it to be.
...and I use other apps to keep in touch with family in different time zones. For me knowing somebody is online in real time is quite comforting. Knowing they got my message and then that they read it, even if they don't reply, is also useful.
I see your point but there is valid usage outside of a corporate setting.
Long time ago when I was actually sending SMS messages to real people, then-current phones had a "delivery notifications" setting you had to turn on. Then you would receive a notification when your message has been delivered.