Lots of ‘mights’ and ‘ifs’. No concrete evidence. Also they write that it might spread out across lots of manufacturers. And not only that, this is an article from when the iPhone 12 got released, which was the first to include a USB-C to lightning adding to the worry.
I have to say that in Denmark at least, iMessage seems to thrive quite well. There are quite a lot using Facebook messenger, but SMS and iMessage is a close second. This is entirely from my point of view. Never met anyone using the examples you mention, unless they are communicating with foreigners on a daily basis.