People buy android phones for all sorts of reasons (in the US, mainly price). But in the US, it’s nearly impossible to have a broad social circle that doesn’t want to ‘text’ so I’d guess at least 99% of US users regularly engage with default messaging apps. if given the choice, of bet nearly all of those users would prefer to centralize their ‘texts’ instead of multi-apping
Look what happened to groupme as soon as iMessage group chat got good...
So you are saying 99% of iPhone users would prefer to use iMessage. Yeah I don't doubt that, it's built in. Still you only need one or two close friends or family members with Android to install WhatsApp.
Why don't people use WhatsApp? Do Android users just not have any friends? Or do they use SMS? which is a joke next to WhatsApp and iMessage.