I think the CPUs for kiosk systems etc. are deliberately ancient. It's as if they have CPU's that reach end of life, they then put them on a shelf for ten years and only after ten years can they be used in kiosk systems.
Those terminals to buy train tickets on UK stations must be using i386 CPUs because even registering a button press takes two seconds. It would be a serious challenge to deliberately create a system that is that slow.