Can you still jailbreak latest iOS? Would that enable you to build/install custom apps without permission?

Especially at the price point they sell them for! I am a hater of all things apple :) my go-to statement is: they make beautiful hardware, but some of the worst software I have ever encountered. Also, the fact that the amount of blatant security vulnerabilities they have had with their walled garden approach and small hardware footprint is laughable. Okay.... End rant sorry 😄