I only buy digital games when they're on sale but this happens frequently. I currently own Black Flag, Tomb Raider, DriveClub, Alien etc. digital. The downside is that I have 500 GB console and I'm scratching for space, had to delete Witcher 3 recently because Just Cause 3 wouldn't fit and I had nothing else to delete. I now have to complete games and delete them, and if I want to play them again it's sometimes a long wait until it's installed and all updates download again - especially bothersome with Witcher as it takes 4-5 hours to download all updates and let you play the game.
I wanted to buy a 1 TB console but can't be bothered to move all files, sell current one etc. When it breaks I will buy a 1TB, for now it's completely fine to juggle games like this. I will finish MGSV soon and that will be 30 GB freed up. The only games which I will never delete because I keep going back to them are FIFA and GTA5 (admittedly it's over 80GB) and it looks like Battlefront will join them up.