Everyone seems to be arguing the same things so I'll explain my post to everyone at once.
What happens when you loose or can't find your disc?
You can't really argue against this one. People do loose[sic] games, and with digital distribution, this never happens. Even if it gets delisted, if you have the game already downloaded, you can still play it.
you also apparently lose at grammar.
You can lose a digital game, too. Just ask anyone that's tried getting or keeping a vulnerable version of a game for use on the Vita, for instance. And in the case of the PS3 and Vita, if your game gets delisted, chances are you also lost the stored login credentials needed to play it, too. Unless you could use something like ReActPSN, you're boned there, too.
What happens when you scratch your disc?
Which is easier? Resurfacing the disk or... um... not having it happen at all?
Short of defective optical drives (which I personally ran into far more often with Sony than any other console maker), it usually takes abusing your games to cause a scratch on the discs to begin with.
What happens when a natural or artificial event destroys your disc?
What's better? Insurance claims or... um... not having it happen at all?
How about actually having the disc to keep playing, vs. some executive arbitrarily deciding to shut down your access to approve your ability to play the game?
Unlike digital, physical can actually continue to operate even when your internet is out. That's more than I can say for nearly every other kind of digital medium.
What happens when you're travelling?
It's easier to not have to bring physical disks in addition to your game system.
Thank you for completely ignoring my point.
A Modded console with external storage is just as sturdy.
What happens when you want to dispose of old games or broken games?
What's better? Recycling or no waste at all.
I'd like to know what it is you do for a living,
if you actually work and buy your games with your own money that is, that you could afford to dispose of old or broken games. With your attitude and words, I'm not convinced.
What happens when you want to quickly find a game from your large collection?
It's still easier to just type the name of the game into the search bar.
ASSuming that the platform even offers such a search capability, or that you have to go and delete your games to get something else... or that the platform you get it digitally actually even ALLOWS you to redownload... considering that it is still left in many a digital EULA that the distributor can revoke or limit your access to the game you just bought digitally...