I work in a company that has a old codebse in c with tons of realtime intime stuff that is acessed via a shared memory from the realtime to the non realtime system. Tons of strucs get copied around then typecast to other structs and global variables all over the place. You never know where a variable is written to and where it is also acessed from or if it is just a copy. No assembly but still super obscure.

Seriusly, if you cant filter information or you are not able to react to your surroundings please dont drive. Half a second of reaction time more is a lot when you are driving a 2 ton car with 100kmh around… that si rhe reason drunk driving is not allowed or driving while high…

With embedded stuff its still done like that. And if you go from the arduino functionss to writing the registers directly its a hell of a lot faster.