wut
are you aware of how these things works
regardless, have you played the witcher 3
What does the Witcher 3 have to do with GTAV exactly? And no Witcher 3 doesn't have the same level either. In Skyrim, everything a person/enemy is wearing is an actual object with data associated with them, the person or creature themselves are objects in the world, all of it is mapped and indexed. Kill 9 enemies in Skyrim, and you're tracking 9 enemies, each of them wearing boots, pants, shirts, armor, sword, shield, helmet, misc. That's 72+ objects being tracked right there, these objects are persistent as well. Witcher 3 is much simpler in that regard, you kill someone their gear is generated when they die based on their level, and it's one object that is represented. You kill 9 enemies in Witcher 3, you track 9 physical objects, the enemy. You click their body (or the mush) the loot and the items are then generated. If you roam around in a different area for an hour or so then return to those enemies you killed their body and loot will be gone. Witcher 3's garbage collection (not the right name for it) is on a much shorter time duration than Skyrim's.
Now back to Skyrim, you enter a village and kill everyone in said village. You're now tracking all the character objects and the times they have on their person, you imagine how many things are being tracked. You can then leave, turn off your system turn it back on and they will still be there, the same objects, in the same position, with the same specifications on those objects. Or if you really want to see the difference, get a mod that spawns a bunch of buildings you can walk in and out of without loading and watch your framerate take an absolute shit when you get near them all. (This is also why indoor areas have way more objects lying around).
All of this takes memory and CPU cycles (also increases the save size, it's keeping track of every single object in the world). So now you have your object persistence system taking up memory and cycles that your renderer uses.
You all demand a new engine (many of you suggesting ID Tech) not realizing they'd have to change how Id Tech works to accommodate how Bethesda uses bit differences for object storage via a bit field. While the rendering engine and underlying parts are separate they're not made without being aware of the other in any modern engine, they're made in tandem. Which is why this really stupid idea of simply swapping out the rendering engine with something completely new but keeping everything else isn't nearly as easy and clear cut as many of you are making it out to be.
You people also want this brand new engine to have the same level of mod support as the old one. Where as the old engine's level of support came through many years of use and reuse, tweaks and tuning.
So really it comes down to, does Bethesda lower the amount of object interactivity and persistence to chase amazing visuals (Which case gamers will bitch the game isn't nearly as interactive as FO3 and other cries). Or do you keep that general level of interactivity (or even increase it if they allow seamless walking in and out of places) at the expense of the latest in graphical splendor? And have gamers mad the game doesn't look as good as GTAV completely missing the point that GTAV doesn't have nearly the object persistence. Or alternatively they can read Rockstar's post on how all those small attention to details things that gamers notice (sweating on the shirt, flip flops sticking) took up a bunch of memory and was a lot of work. Or ignore the big ass elephant in the room that is...GTAV had a damn £250m budget.
But hey keep comparing GTAV to Skyrim.