As far as I could find, the text suggests that only applies to market giants (i.e. Meta with WhatsApp and Facebook Messenger). iMessage is not even breaking the top 5 in the EU. It's not even in the top 5 world wide, and even in the US it's only somewhere in position 4 or 5. If they go for absolute numbers (i.e. X million users) instead of market share that might be different, but it's unlikely to really be relevant to the EU considering from a user's perspective it's already interoperable (messages sent on one device end up on the other device, even if it's technically a mix of SMS, MMS and iMessage - that part is not really relevant).
I think the only source of all this iMessage this that and the other comes from parts of American society where they value the color of a chat bubble. Ironically that value has nothing to do with iMessage and just to do with "this persion I am chatting with can afford an iPhone", which in turn is what people appear to value.
In countries where iMessage is not really used, it doesn't matter at all. I would be surprised if most users would even know about different chat bubble colours and what they mean.
I think the only source of all this iMessage this that and the other comes from parts of American society where they value the color of a chat bubble. Ironically that value has nothing to do with iMessage and just to do with "this persion I am chatting with can afford an iPhone", which in turn is what people appear to value.
In countries where iMessage is not really used, it doesn't matter at all. I would be surprised if most users would even know about different chat bubble colours and what they mean.