My only real bugbear with pre-booked seating is that a couple of places I know operate systems that don’t allow you to book seats in a pattern that leaves a single seat empty.
Which makes sense for regular cinemas with theatre-style seating (they don’t want to leave a smattering of empty single seats across the theatre that no groups will want to book). But there is a cinema near me where virtually all the seating in every screen is two-seater sofas, and they don’t let you pre-book in a way that doesn’t fully fill a sofa.
So if you’re booking for a single ticket (I often go to the cinema alone) - or indeed for any odd number of people - it can be impossible to book tickets in advance. Which seems ridiculous to me, and on more than one occasion has prevented me from being able to book at all.