How old does a game need to be to warrant a remake?

[SanAndreasX]

Metallox said:

The_Liquid_Laser said:

It needs to be at least 20 years old, and it needs to stay as true to the original as possible.

Do you dislike Final Fantasy VII Remake? 

If they were remaking FFVII, I would have preferred more of giving the core game a Dragon Quest XI-style facelift, but otherwise sticking to the structure of the original.