I was today years old when I learned that (on macOS) single-click-and-drag will use character granularity for selection whereas DOUBLE-click-and-drag will use word granularity for selection!
@sommer @frederik I believe this is borrowed from the X Window System from the Unix days, and its true origin may even predate that. I've been double click dragging to select text since the early 1990s in xterms.
@gregggreg @sommer @frederik the X Window System borrowed double-click-and-drag from the original 1984 Macintosh. Try it on System 1.0 here: https://infinitemac.org/1984/System%201.0
Infinite Mac

A classic Mac loaded with everything you'd want.

@tim1724 @sommer @frederik Wow that is interesting. I wonder if the Xerox Alto had this as well? It may well go back to the invention of the mouse.