I actually do think that this is an interesting comparison. Like from what I gather if you could somehow automate a process where overnight every phone would get WhatsApp installed, all of your existing contacts were instantly added to it, and the icon was right where your current SMS/iMessage default app is, everyone would probably adjust instantly and quite possibly be way happier with a superior text chat app. But without that sort of magical rollout, aside from the people that are currently the odd ones out, I think it's just kind of perceived as a solution to a problem that doesn't exist. I think the metric system faces a similar inertia. "It's more intuitive!" "It's what most of the rest of the world uses!" OK. These are valid points, sure. But most people are satisfied with what they already know. It's pitched as the answer, but the problem is that most people aren't asking the question to begin with.
