The analog technology is forgotten about as a relic of the past.

Take this light meter for example. Light enters a photocell and changes the magnetic field of a galvanometer.

This indicator (a small sticker really) is then projected off of a 45* mirror, through a condenser lens and suspended on a beam splitter (a two way mirror essentially) and appears magically in front of your eye, superimposed onto your field of view. #RetroHardware

via Brian Roemmele from Twitter