Modern vs Medieval, what time is it?

[Risvertasashi]

Saying all this to sate my curiosity on the state of the world on the Source. A lot has happened since 2.0, and as the expansions go on, I'd like a more clear understanding on what constitutes as the norm or standard in a world where a chocobo carriage can slowly carry on, and then vroom vroom two Adventurers are doing sick donuts in a Regalia and SDS Fenrir.

It's also worth noting that canonically, the ironworks whipped up the Regalia copy just for you. Kind of like how you're the only WoL, canonically. These things aren't being massed produced.