I've managed to go a very long time - living in both the UK and the US - using only iMessage and (as of around 2017) Signal.
I finally had to install WhatsApp on a trip recently for group coordination, but ensured it didn't get things like contact access, and removed it afterwards.
Kids school may well be an outlier (US), but they send formal communication by email (with an SMS notification or call for emergencies), and the parent group is all on iMessage.
I finally had to install WhatsApp on a trip recently for group coordination, but ensured it didn't get things like contact access, and removed it afterwards.
Kids school may well be an outlier (US), but they send formal communication by email (with an SMS notification or call for emergencies), and the parent group is all on iMessage.