You know what was the best? The GOTY editions of 360 games that came with install discs. Games like Oblvion, Fallout 3, and Dragon age GOTY editions had all the DLC on a second disc that you just installed to the HDD, then used the main disc to play. You could lend the DLC disc to friend and even if they had a non GOTY copy of the original game disc they could get the DLC and play it with their own main game disc.
Not sure if it worked like that on PS3, but it was great. My friends and I took advantage of that a lot. I think maybe only one game didn’t let you do that and that was Arkham City GOTY, which had the same DLC disc to install, but required the “GOTY edition” main game disc or it would disable the dlc, which was bullshit.
And now those GOTY versions BC on Series X are playable, but if you want to play the DLC you to play the game using the DLC disc as the key, so you can’t do the same lending trick, which is also bullshit.
Anyways that’s my TedX talk I hope you liked it.