Telegram for family, friends, work and actually for everything I can think of.
Discord for gaming with friends, not as a messenger but as voice comms mainly.
Whatsapp for very legacy stuff, haven’t had a notification in a couple of years. Maybe it’s time to uninstall, finally.
Thankfully I don’t have people I need on WhatsApp, but it took some convincing.
Nowadays I only have dentist and barbershop on WhatsApp, all my folks are on Telegram, including all work communications.
WhatsApp was always lacking features; WhatsApp web can’t replace a full featured desktop client which is a must have for me; and its mobile client is inconvenient in every possible way.