Well I’ve been able to RCS with basically everyone on an android phone since 2019 with almost no issues. That’s 5 years now.
I don’t really care how Apple wants to try and justify it. The answer is they don’t want to add support for an alternative to their walled garden proprietary system that no one else can use. They want to force everyone onto an iPhone and iMessage if possible. The only reason they’re even looking at RCS support now is because of regulators starting to look at their glaring lack of support for interoperability.