While I was playing with my friend I came to the conclusion that factories are not that important and cities are next to useless once you have enough of them and also the fact that getting vehicles and planes is very difficult

I was wondering if it even would be possible, once you get a vehicle you would get the ability to research it the research speed could be relative to your population which scales by cities and once you research a vehicle / plane you would be able to build it with factories

variables like research length, build speed and cost could be derived from vehicle health, ammo / repair / fuel capacity and other factors of this kind I am more than sure that I overlooked an important factor

I am pretty sure most people can agree on that getting vehicles and primarily planes is really difficult and tedious you can always lose them way more quickly than gain them

Also the fact you can't get planes other than capturing airfields or the enemy airplane somehow not exploding on impact is not helping either you can always give the AI more money multipliers but that only works well for vehicles

I am open to discussing on how this system could work, the prices and overall the balancing