Has the thinking behind headrest (perhaps more accurately headrestraint) technology changed?
Years ago, 'active' headrestraints were the fashion - in the event of an impact, the restraint moved forward to meet the driver's head moving backwards, thus minimising whiplash (that was the theory, I believe.)
Has that theory been disproved? We've gone back to fixed types, albeit they are now an extension of the seat and cannot be adjusted for height - rather than the earlier type 'planted' on the top of the seat, but adjustable for height?
Drivers used to have to adjust the level of these older types according to their physical height (a too-low-set headrestraint could actually cause serious damage in the event of an impact.
The new part-of-the-seat type have no adjustment, so as we are all different shapes, our reaction/comfort could be very different.