I’ve been trying for weeks to get friends to move to Signal. They don’t have to delete WhatsApp or Facebook Messenger to use Signal. Some of these people have got degrees in various computer disciplines and still won’t even give it a try. I don’t understand the reluctance to try new software either. If their job or uni asks them to use a piece of software they’ll try it no bother but if a friend asks it’s impossible. It’s so strange.
There was an update a while ago that lets you turn it off if you want. I’ve almost forgotten it’s sound. Almost.