IMHO, these operators are the worst features of C. Particularly I never understand the necessity of both i++ and ++i operators in language at the same time.
It's to make code more concise. There are many idiomatic one liners to compare arrays for example or to find the first element which satisfies the condition etc.
I don't mind removing them but their usecase is obvious: make the code more concise and more readable (and yes, if you program in C on daily basis you don't require a double take or thinking about what ++ does).
IMHO, these operators are the worst features of C. Particularly I never understand the necessity of both i++ and ++i operators in language at the same time.