In my world everything is formed from the following fundamental elements. Air, Water, Fire, Earth, Nature and Mana. I wanted my creations to be able to travel faster than the speed of sound with no sonic boom, so I decided that Air would be generated instead of just being present in the empty space.
So when you talk, you generate air with your vocal chords. When there is a breeze, it is a combination of thousands of plants moving in unison to create the breeze. And when it storms it is a mixture of fire from the sun, water and its evaporation and plants moving when hit by water which create great gusts of wind.
Anyway the end result is that Air Friction doesn't really exist. If someone travels faster than 300m/s there is no sonic boom unless they created a huge column of air behind them to propel them that fast in the first place, or they ran into Air that had been generated by someone else.
So I was wondering, if there would be any significant changes to modern society if Air Friction didn't exist. (All I can think of is that ground vehicles might be more efficient and planes would need to operate off a different principle.)
Edit: Some Clarifications on my World
Its a world with magic. This doesn't mean I can just hand wave everything because I want to. There are rules and consequences of such rules. For the purpose of this question, Air in my world is generated by movement or magic and then dissipates. This for me means there is a lack of air resistance (there might be more consequences)
Gods. Life didn't evolve. It was created. The Gods too just appeared. You can think back to some old mythologies, where beings just existed in the void.
The concept of space doesn't exactly exist. There are meteors, but they are the result of continent sized floating islands colliding with each other and exploding. Gravity is also localized around the earth element and is uniform, extending out from the continent in all directions. I haven't figured out a distance, but once you are out of range, you are essentially floating in space with no way back unless you use magic.