So Sync’s UI is good for you, you have used applications that make you kinda got used to Sync. It’s called anecdotal evidence I think, when you make conclusions based in single test case. I’m happy for you. I like Sync UI best of all too, I tried multiple Reddit clients and Sync was most convenient for me.
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.