It will be fun when we get to the era where this is bulletproof-reliable to this extent, but for now, recorded notes with accelerometer-backed GPS locations are probably a better idea than hoping the AI will be able to do this for you dynamically without you driving off a cliff.

This is I’d say partially because we don’t have a HUD that can handle the bandwidth and pace of data required for rally. Overlaying a visualization of the turns ahead would be much better than a copilot for sure

If we have HUDs that can handle aerial combat, why don't we have HUDs that can handle racing?

this is true, so we just lack the incentives to make them? a human copilot is just a core part of the sport?

Budget? It's a better trade-off to have a second human and to put the money into tuning the car.