That funny. I love smb3 and smw. My girlfriend and I beat them both doing every thing loved them. And SMB 2 and yoshis island.
Then we tried Mario 64 when it came out. So boring we quit. Hated the design, the repetitiveness, the movement, the sound, Mario as well.
That was the end of Mario as far as we were concerned.
I find it strange to this day that it is so well liked.









But they all get abandoned or suck at launch to begin with.
A streaming 4K dedicated device is about 20 to 40 dollars, which always seem to work better then whatever a console offers and for longer.
I see no advantage to have a steam cube with it.
That said, I did put Plex and jellyfin on my steamdeck so I could watch my own library while flying, so I suppose you could add either of those to the cube. They launch as just another game by the way.