The borrow checker makes things a bit more complicated to get running, definitely takes some getting used to when you come from a non-memory safe language. But the compiler is really helpful throughout almost all mistakes, often directly providing an explanation and a suggested fix. One of my favorites programming experiences so far

Dwarf planets sometimes have moons (e.g. Pluto)

Network effect. It’s been hard enough to get friends and family to move away from Whatsapp, it’s going to be a while till I get them away from telegram as well