Share 'Fretboard fall-away....Yea or Nay?'

Hope everyone had a fine turkey-day!  This isn't a specific repair-related topic, but what's the general consensus about using (or dealing-with) fretboard fall-away at the last couple of frets?  Do most guitar builders employ it?  Do a lot of repairers use it as a matter-of-course when refretting?  Is it used equally for acoustic & electric fingerboards? I've got my own bias towards not using…