Technology Progression
In one of your videos you guys mention that you can have techology that is beyond the in-game time but it would be more expensive the further out you get. Does that mean technology will get cheap over time to allow you access to tech at the appropriate date? Or is there research invovled? How does cross company tech work? can you only buy a engine and plop it in a car or can you modify it?
On a side note: In my dreamworld (I realize this probably isn't possible) I would have a sort-of-technology tree. It would be a technology tree in the sense that you could research new tech (like a diesel, hybrid tech, EV, etc). Then when you researched the new tech you could pour money into that tech to make it more efficient/cheaper to produce/reliable/etc.
As far as cross company tech. I would say it would be cool to "rent" tech. Meaning that if I wanted to rent diesel tech from some company, I could use their tech to design my own engine but could only use it so long as the agreement is in place or until I research up to/past that tech level. Now that I think about it, it would also be cool if you could buy an engine from another company but for cheaper but as a draw back couldn't modify it.
All of that was pipe dreams. I'm sure you guys have better (or at least more reasonable ideas). sorry for the mostly incoherent rambling.