dunno,back in the day i used to buy games for my ds and i was very excited on my way home /gewd but steam is diffrent.
essentialy every mechanical storage solution will soon be gone invcluding HDDs CDs Bluray and all these other moving storage solutions
flash storage is far superiour so expect it to die off soon.
but lately many games come with steam codes inside of them so i guess its the best of both worlds?