I've still got Signal installed, but never use it, I only ever ended up chatting on it with a few ex-colleagues, who were fellow devs / nerds.

I have so many WhatsApp group chats (here in Australia) that are critical for me these days, and that I don't control, and that have way too many people, and way too diverse a range of people, for me to have any hope whatsoever of migrating them all to Signal. School parents group chats (one for each class that my kids are in). Strata (aka Home Owners Association) committee group chat. Scouts group chat. Various friends groups chats. Boycotting WhatsApp is not an option for me, it would literally make me unable to function in a number of my day-to-day responsibilities.