Hey, thank you for reading my idea and responding.

It was just an idea I had to make the late game more interesting.
Point being is, that maybe ONE intermediate product could be made as well - maybe for higher cost and only for high research cost.

But I see your point, and the more I think about ...

TL;DR
Have the assembly machines producing one of the "lower" products AND the desired final product.

What ?
I'm suggesting that the assembly machines could (by research) be enabled to produce one of the ingridients of desired products itself.
Take the electronic circuits for instance, instead ...