> and that itself cuts a ton of orbital debris (spent stages). Almost all upper stages for LEO missions get deorbited (or at least they're meant to be deorbit

> and that itself cuts a ton of orbital debris (spent stages). Almost all upper stages for LEO missions get deorbited (or at least they're meant to be deorbited). It's typically only the high energy missions like GEO/GTO where upper stages get left in a "graveyard orbit".