does holding Shift in Starcraft and Starcraft 2 while issuing a move order makes the unit follow way points, I know Total Annihilation has this behaviour

Yes, it does. Works with the patrol command too. It is pretty essential to make units run around in loops, for example, to block your opponent building an expansion early game.

I fall in the “me too” category. I took Starcraft as reference but I wasnt sure about this particular feature. Lots of games with advanced technology under the hood skip over at showing everything they`re capable of. I wanted to know if Starcraft is explicit about waypoints.