I think this was true but is changing. I've deleted WhatsApp and switched to Signal a few years ago, and now I use iMessage with all my friends who don't have S

I think this was true but is changing. I've deleted WhatsApp and switched to Signal a few years ago, and now I use iMessage with all my friends who don't have Signal (maybe 4-5 people that I text with regularly). Interestingly enough, I don't have any close friends who don't have Signal and don't have an iPhone...