Dave M said:
A great example is electric power steering. Is it an improvement over hydraulic power steering? Well, it is lighter, more reliable and cheaper...but you lose road feel. So on your ultimate-sporty-driver's car, you'd still want the hydraulic steering (and a MT, obviously).
EPS is rather like hydraulic in that it can be very good, or very bad.
I grew up on a car with zero-feel ultraboosted power steering. Then I got a Subaru with on-center front suspension geometry and it was good. Then I got a Japanese MGB-GT ('80 RX-7) and I was awed at the steering feel you get with a 2200lb car, 185/70 tires, and steering geometry that allowed that to work. Nothing else since has been as good, except for the '83 911 that I got to sample for a while. But Subaru still had the best power steering, in the 80s at least.
The car I have now has the typical "stiff = sporty" overdamped hydraulic power steering. It also has fat rubberband tires, so it kinda NEEDS that in order to not tramline all over the place. Tires with canoe shaped contact patches (tall and skinny) have enough self aligning torque that they pretty much handle themselves. Wide, low profile tires need to have steering geometry that imposes its will on the tires, since they will not track straight on their own.
Tying this in to EPS. I really like the GM motored-column systems for their simplicity and how much they do not kill road feel (such as it can be with the cars they are attached to). But if you want BAD, I had an eye opener when I had a GM with a motored-rack system on the lift, running, and I tried to move the steering by grabbing the tire and shifting it. Couldn't. The car was actively preventing me from turning the steering just as much as if the column lock was engaged! Now that there is a recipe for a horrible, zero-feel system.
This is whwre my commentary about tire sizing originates. If you have a vehicle with tires that generate a lotmof self-aligning torque, you do not need steering setups that enforce stability. This means the steering can be allowed to communicate what is happening on the road.
Automatic vs. manual doesn't bug me much. But steering? That is the primary vehicle control and the most tactile sensation you get in the driving experience, and so I take it VERY seriously.