They have stayed up because they have a policy that you shouldn't download the game if you don't already own it. Therefore, it is completely legal and makes sense to have the ability to download games on a console, rather than having to remove the disc and switch them.
On the series s/x you can use a external HD but any next gen games must be on your internal ssd, or you can buy a ssd expansion card, but pricey. Any xbone, 360, or og Xbox games can be played from external tho.
I've been playing Killer Clowns from Outer Space all day, is pretty fun. Basically Friday 13th but with clowns. One of my favorite b rated movies from way back.