> Also FaceTime for calling distant relatives.
Are your relatives unable to install Signal or WhatsApp?
Yes is a possible answer here, but installing a messaging/video-call app seems pretty low effort. I've had several elderly relatives do it and none required hand-holding, just the name of the app.
Even starting a FaceTime call is a struggle for lots of people.
Installing an setting up Signal or WhatsApp is out of the question for a huge portion of the population.
At the time neither WhatsApp nor Signal had iPad apps. Looking at it now it seems Signal added that in 2020, WhatsApp in 2025. But I switched years before both.