prius wheel alignment in dealership?

My son works at a Dealership. He told me about them installing an alignment diagnostic device at the drive-in station where you leave your vehicle, so every car's alignment is checked automatically, every time you take it in.

Is it simply a way to increase how many alignments they do?
Or is it truly needed?

I do not know. They nailed me at my next servicing and it turned a 30-minute servicing in to a 5 1/2 hour wait. I was not real happy with that.

 

I have read somewhere that after an alignment, the yaw rate and steering angle sensors will need to be rezeroed or VSC may not work properly. I don't know if there is any truth to it. If there is, the dealer would be a better place to perform these procedures. Not sure if NTB or the likes can do it.

On the other hand, I think if the alignment is too far off, the VSC light should trip, because the steering angle will grossly mismatch the yaw rate.