These games are all on print so for preservation purposes they're all there.
007 Legends had DLC for the upcoming Skyfall movie. It was released for free when the game came out, to coincide with the movie. It was the final level of the game chronologically. Activison lost the license. That DLC is gone. There is literally no way to play the last level of the game on PS3. THANKFULLY the Wii U version contains it. But don't give me that nonsense that just because the GAME is available means it's all preserved.
Motorstorm requires a patch to access the DLC and other features like the time trial. Except, it was a launch title, and the patch system is in-game and NOT on Sony servers. Those servers are gone. So even if you DID buy the DLC, you can't download the patch anymore, so the access to that DLC is lost forever.
Same thing for Eye of Judgment and the Set 2 and Set 3 DLC for the game. Those are tied to defunct servers and paid DLC.
Other exclusive titles, like High Velocity Bowling or Pain, are a mess without their online servers, too.
While Hot Shots Gold World Invitational was sold digitally and physically on the Vita, the physical version was never released in the states. Digital only. Sure, I could import it from other countries, but unlike the Xbox, PS3 DLC is often region-locked to unique SKUs. So many of the courses and characters there are also going to be lost to time. Now do I need to maintain not only international accounts for games, but also WALLETS for them, too?
And don't get me started on Guitar Hero, Rock Band, or any of the other music games.