You're missing the point though. Imagine you didn't own it. Imagine there was no physical release on future games and a game gets delisted everywhere, what are you going to do? beg someone who bought it for their username and password? At least when a physical version exists you can still buy the game from somewhere.
The thing about physical vs digital really comes down to each products viability (business wise).
A lot of gamers might not like digital only, but if gamers look at the big picture digital is the medium allowing shit loads of games to still be sold. Heck, I bought Cinemaware Anthology on Steam a few years ago. And lucky for me there's actually a digital download for it. And even better it's the Amiga versions! The last time these games were on disk was probably around 1992 on 3.5 discs.
Some things might not get a digital release and some get taken down. But if it wasnt for digital , any gamer would be hard pressed to buy oldies since most games go out of print (esp a 12 year old game like Spec Ops). The best alternatives would be buying a used copy hoping it works or some guy on eBay selling a sealed copy for double the price. The amount of sales old 360/PS3/PC Spec Ops copies sold if all were still available on a disc would be almost zero. But at least it's still available digitally (until now).
So its one of those things, you take the good with the bad.