Well, I can't be holding everyone's hand every step of the way. I get enough complaints about video length as it is.
There are so many factors in play when it comes to military production, though. I can't imagine a situation where more equipment =/= better, but the specifics are somewhat country and date dependent. If you are supply capped, more tanks may not be useful. There is no synthetic aluminum, so at a certain point aircraft production is capped. And while I just tested MIC, nothing says you can't trade out MIC for NIC if you think that would be useful.
There is a point where it's impossible to make use of more MIC effectively, but that's usually on really long timelines with tons of puppets from peace conferences or occupations. And you need tons of equipment to get to that point, so you used extra equipment to get to the point where Germany has 700 MIC thanks to annexing everything from Casablanca to Saigon. At that point, we're probably not worried about the fact that there's not enough steel on the planet to manufacture any more infantry kits. (And I'm pointing that out because I know someone will mention lack of resources.)
Which is my long way of saying that I can only show you a measurable equipment difference between pure MIC and 24 months of CIC. I can't tell you all the ways it can be used.