A very good and nice guide, CSU1. As we all (should) know, version V improved gamepad control by allowing a wheel turn of 90 degrees.
Analog steer smooth delays the speed at which the wheel turns, and yes, even at 70, it allows for superhuman turning skills (when using a pad).
90 is the highest setting, and indeed gives a very smooth appearance.
When driving (for example) the RAC, I sometimes want to correct a steering mistake (oversteering) by a quick counter. With steer smooth at 70, this is easily possible (allthough less steer smooth makes a steering mistake probably also more likely in the first place) but with 90, the wheel turns "too slow"... that is, slower than what my mind is thinking right then.
On one hand, perhaps 70 is a wrong setting for a pad, because no real person would be able to turn a wheel as fast.... but, maybe a human being is able to steer faster than what happens at 90 (I'm not sure on that one TBH)?
Then there's the issue about thought - reaction. You've already reacted by pressing the gamepad stick the other way, but because of analog steer smooth the reaction on-screen is lagging compared to what you were thinking (this can potentially also cause steering errors by not countering enough or over-countering due to the onscreen action being different from what you're actually doing). With a wheel, you might not be able to turn as fast, but the reaction is almost the same as it would be with a real car....at least, much closer. Of course, if you don't twitch your gamepad's analog sticks like an idiot but gently, the steer smooth is so close to realtime that you do not notice the difference.
On the other hand, absence of analog steer smooth, even if it makes a pad VERY sensitive (disadvantage), could be seen as a cheat, because you can indeed steer much faster than one could normally do.
This makes you wonder if perhaps LFS should have a "minimum smooth" based on how fast a human can turn a wheel, but that'd be difficult to determine.
Basically:
-low analog steer smooth value: (near) realtime reaction, but superhuman wheel turning
-high analog steer smooth: slower but (visually) more realistic reaction on screen
I'd like to hear a bit more opinions on this, and this thread seemed a good starting (or: continuing) point. However, if it's better to make it a separate topic then that's fine too...