Digital has a lot of benefits, but this is by far the biggest downside of a post physical media world.
In what sense though?
The game was indeed released via retail as it's primary medium back in 2011 and 2012. Only the PC version in 2013 was, I believe, digital only (with boxed copies simply having a Steam download token inside).
At last check, the game can still be bought for PlayStation 3 via the PlayStation Store, and anyone who owns the Xbox 360 digital version or Steam version can still download it since it's tied to their account. Not sure about digital for the PlayStation Vita though.
Online servers used to get shut down back in the day as well once the player base was deemed small enough for long enough so companies could save costs, but physical or digital copy, all offline modes still work, to my knowledge. People can still buy used copies of the game as well.
The only issue I see is that for those not buying the "Komplete Edition" on Xbox 360, I'm not certain if their game will still be patched up or not.