For me it's a per-game situation. Oblivion Remaster makes sense. RE2 Remake also makes sense. MGS3 always felt like a 'doing the best within our limitations' issue.
You could tell when looking at Kojima's initial interviews and behind the scenes footage of earlier versions of the game, he had something much larger in scope when making MGS3. An actual sprawling jungle where you would have to use camo, survive, etc. in enemy lands and (potentially) kill the bosses in a different order. A proto-MGS5 in some ways.
Unfortunately it was all squeezed into segmented corridor-like areas with some mud, grass, water, and tress placed in between as the game barely managed to hit 30fps on PS2 (but it did look visually great for it's time).
These Delta devs were so afraid to change anything that they have even kept those 'transition' loading screens between areas. To me, that's wasted potential.