Low speed (almost stopping) weirdness

[Amanda]

On (almost) all sims I own[1] if you're on a hill and release the brakes the car will move. If you're on a flat plane on first gear and slowly release the clutch, the car will also start moving.
However, on Assetto Corsa the cars seem to be glued to the road on these scenarios. This makes it impossible to have realistic starts because you must spin the wheels at all race starts otherwise your start will be too slow.

Does anyone know why this behavior was introduced? I remember seeing a livestream from Stefano where he could start rolling the car just by releasing the clutch, and another one where he let go of the brakes and the car started moving backwards on a hill, both of which are realistic behaviors.

[1]
Race07
GTR2
BeamNG
rFactor 2
Project Cars 2
F1 2017
RaceRoom
Assetto Corsa*

 

[Pawel Ziolkowski]

Driving out purely on iddle is impossible, but as long as you give it any throttle (even 0.001%), the "move lock" will be gone and idle will pull the car away. So there is no problem launching without any wheelspin.

Does anyone know why this behavior was introduced? I remember seeing a livestream from Stefano where he could start rolling the car just by releasing the clutch, and another one where he let go of the brakes and the car started moving backwards on a hill, both of which are realistic behaviors.

It is like that because the "movement lock" is a simple solution to more complex problem.
Some racetracks have start grids and pit lanes on inclines so you'd need to make sure everybody uses handbrakes, then you have to create more rules governing movement before start (how much can you roll from your spot before lights go out etc). AI would need more code for that too.
Also because the game has to run on different set of physics below ~3km/h you'd have to make sure these physics are better, with correct static rolling resistance (would have to be a new variables made for all cars etc etc).

And after all the work, it would have to be automated anyways (so like we have it right now) for people with gamepads or mouse steering. Then people on public servers (or even in career) would complain about crashing before start, and automatic mode would be made default and after some time everybody would forget that it can be disabled.

A bit sad but it just wasn't worth the hassle.