[rezonant]

Because the market we're talking about is not the broader messaging ecosphere, it's "texting". To the US consumer, Whatsapp and the like are not texting. Frankly it makes total sense that this is the way it is in the US, because most people do not want to waste their time using a messaging app that can only message a fraction of people. They want an app that can message 100% of people. Apple Messages can do that, as can every other texting app, because the lowest common denominator technology (SMS, soon to be RCS especially once Apple ships it) is supported on every single handset. You never need to guess if a phone number is on Whatsapp or Signal or Telegram. You can just send a text to it.

This is pretty different to the international dynamic, as MMS often comes at a surcharge in many non-US markets, but here unlimited MMS has been included in most plans for a very long time, so there's not even a "hey, you are costing me money" stigma involved like there was in the bad old days decades ago.

[agos]

there is no "guessing", the person giving you their number can also tell you which platform they are on (in my country 99,9% of the time it will be Whatsapp).

making an antitrust case on the basis of "I don't want to guess" seems weak, but law can always turn out counterintuitive

[smoldesu]

> the person giving you their number can also tell you which platform they are on

That... doesn't solve the problem. We don't need fragmented messaging systems, we need the world's largest company to lay down some rules and abide by them. Right now, the existence of iMessage is predicated on the poor performance of traditional SMS messaging. It wouldn't surprise me if the United States (much like Europe's antitrust council) forced Apple to standardize their proprietary alternatives. There's nothing counterintuitive about that to me.