So, in easier terms, you shell out the same money but get limited benefit from doing so, usually in a category that you're not willing to spend a lot of time on.
So it MAY be more beneficial to have a 100% Graphics V3 than a 50% Graphics V4 in my game (or whatever). But if I have the option of cutting an option out of many, most likely it will be better to cut a single option to get the entire thing up to 100% because then all the other bonuses work at full effectiveness.
This makes sense. I like that tech has a big impact on the games. I like that small games can't have perfect graphics and sounds and world design, too. It makes sense that you'd have to skimp somewhere.