I've had no less than 15 cars during the last past 20 years.

I don't remember having experienced a faulty headlamp bulb

You would think with all the technology and warning systems they put on cars nowadays it would be possible to come up with a test sequence that warns if brake lights etc aren't working before and during driving...other than a quicker flash on the indicator! FL No 1 - 2012 (MY2011) XS manual Firenze Red - Gone
FL No 2 - 2012 (MY2012) XS manual Barolo Black - SWMBO wanted one too!
FL No 3 -2013 XS SD4 Auto Santorini Black
Series III SWB Hardtop - long gone
110 CSW V8 - long gone
Discovery 1 200Tdi - long gone

Many cars used to have bulb failure indication on the instrument display, this has probably been removed and replaced with cup holders, that seems to be the most important feature these days