I have seen some things recently described as retro. I understood the word to mean that it was a new part to fit only an older obsolete application. Like a complete friction shifter assembly with frame strap would be retro. This would allow one to install a set of friction shifters on a bike with no shifter bosses. Some time ago, I saw a listing for "Simplex retrofriction" shifters. Today, retro brake levers. Is the word "retro" simply being used in place of old? Retrofriction is really just an ordinary shifter...Right?