It certainly doesn't offer the performance, and Android phones never have. If I look at the 6a, it offers marginally better performance than the iPhone X, and that came out in 2018.
This is pretty disingenuous I think. Other than Android who is using RCS?
Why can't I message between WhatsApp and an RCS client. Or any other chat technology, how about Google Chat to RCS, or Slack to RCS, or anything else.
Their examples for 'the modern standard adopted by most of the mobile world': Motorola, OnePlus, Google Pixel, Samsung, Snapdragon are all providers of Android phones, so clearly they would use the default Android messaging service.
I have a few folk (mostly family) who uses Apple messaging, everyone else seems to be on WhatsApp.