Thoughts on going from iOS17 Trollstore to iOS18 developer cert?

Currently have iOS 17.0 Trollstore and using mainly uYou, Whatsapp and Apollo. I am thinking of updating to iOS 18 soon and wondering if I would lose anything (besides cash) buy using a paid developer cert from Apple to sideload? I am confused on whether notifications for whatsapp would work. I don't mind paying $99 per year and more concerned about any features I would lose.