I'm a light freak and bindings are heavy. Really heavy for high din bindings. So I use plastic low din bindings to keep the weight down.
@Philpug gives me a hard time about my Fisher-Price bindings.
Modern bindings seem much better than older bindings. I rarely release with a setting of 7 on a max 10 binding as there is lots of recentering to keep the ski attached in chatter. There's a lot of design that is independent from how strong a spring is.
Higher din bindings running at light settings should last longer - but I buy new bindings for most of my new skis (and hopefully I'm mostly skiing and liking my new skis).
Eric