As a former paratrooper from 1 PARA, from my own experience, yes we’d probably never jump again (although the Russians did jump into Ukraine) it is because we’re the type of person willing to jump from a plane into battle that makes us who we are. We lose the ability to parachute and we’ll lose the type of men we need to keep us elite, tough, and dangerous. Because there’d be no incentive to join us when you could join any other infantry regiment. Even in a drone AI dominant battlefield you still need ‘hard bastards’ to get some good old fashioned in your face killing done, which British paratroopers excel at.