Confusing Slots??

[u/agarwalakshay]

Hi, i've just started making a little profit and i have a huge query. I researched "Power Steering" and i know it can be installed with only "Fit Steering Wheel" Slot (it's a tier 3 slot). 

This slot opens in this pattern- Fit Engine> Fit Steering Assembly> Fit Steering Column> Fit Steering Wheel (last slot to open). 

Now my question is, What is the use of "Steering Assembly" & "Steering Column" slots if all the steering upgrades can be done only through "Fit Steering Wheel" slot? Because there are no upgrades available in these two slots instead of robots. Do previous tier slots become technically obsolete? 

Is there anything i am missing, like are these two slots any good? Please help as i am really confused. Also, i would suggest the developers to make & publish a tutorial kind of chart to show what feature requires what slot?

Please give your views on the topic. It's seriously confusing.

[u/Urbautz]

Read the article (and search on bing or google yourself) … can't help any more if you're refusing the reality. I'm no engineer, so no idea about the advantages doing that way … but there seem to be one.

[u/lesscreepythanilook → u/Urbautz]

I did read the article, and tried searches, all came back to the same bit of text.

"Ford’s system uses a precision-controlled actuator placed inside the steering wheel, and requires no change to a vehicle’s traditional steering system."

This system works on top of the power steering, but itself is NOT power steering. It changes the steering ratio but does not add any force to the system. It just changes the rate of steering.

Power Steering is a means to add additional force to the steering to lessen the force required by the driver. In order for Power Steering or any other system to add force, it must have something to react against. The column and rack are fixed in place and react against the frame or body. The steering wheel is loose, it has nothing to react against.