That's interesting, here we use SMS so nobody is left out. You don't have to download an app for it and just about every plan for the last decade has had unlimited texting (or a ridiculously high limit).
Yeah, but you can't easily create and manage groups with SMS or share photos and videos conveniently and absolutely everyone owns a smartphone now from the wealthy to homeless people so downloading a cross platform app is not a barrier
WhatsApp ran quite well on Nokia's S40 for many years - so even those with 3-day battery, $20 featurephones could use it. Unfortunately, after the Facebook acquisition they deprecated support in favor of feature-bloat based on smartphone capabilities (IMO)
