I tried switching to Signal a couple years ago but I had to return to WhatsApp since literally no one of my friends and acquaintances did the jump. It wasn't even considered an option by many. So it was either returning to Whatsapp or being cut off from everyone.
If people were a bit more open-minded Signal could be a good alternative. But alas...
It's still installed but it's kind of difficult to use if no one I know is even willing to try.