It massivelly depends on what changes and how well in terms of software design the whole is done, and judging from what I've seen, for multiple reasons (it's easier to exploit yound and naived developers and those don't know how to do good software design; performance tends to be a big thing in games dev and performance optiomizantion generally goes against good software design; it's an area that tends towards experimentalism rather than well though integrated software design) gamedev isn't an area of software development were software design tends to be good.