I'm not a fan of the "war" between Android and Apple when it comes to SMS/texting. The rest of the world doesn't use SMS/RCS/iMessage as much as WhatsApp and the like, so the US is pretty much lagging behind everyone else on this anyway.
That being said, I have to admit Android did a good job with this!
Give google a break, its hard for them to keep track of what message backend is in which app. They have created and killed 5 messaging apps in the time I wrote out this comment, how can you expect them to know whats going on?
This kind of shit is why I've been working on replacing things, and leaving their ecosystem. There are 57 ways to do everything, and nothing ever works properly.
I am all about tweaking and changing things, or adopting something new, but that's all under the assumption that it works. One of the reason why people like iMessage is because they don't have to fuck with thirdparty apps, half of which can't even receive a text message without issues
I'm not using RCS until it is available with no vendor lock-in. Call me when third-party apps like Textra can use it, and I don't need to use Google's relay.
Canadian carriers did, but they since have started moving towards Google's RCS servers instead. Probably realized it wasn't worth hosting a server, and then maintaining it. I remember some carriers wouldn't update their servers, so not all RCS features would be available to them.