And a corkboard, yes. Or maybe a big wall calendar.

The old clocking in system with a card and stamp from the clock we're efficient and everyone understood how it worked.

That's minimal time tracking, not scheduling. It's the difference between retrospective and prospective.

Kanban systems with real physical cards work pretty well. And you they are way more resilient than digital stuff.

Good point.

Scheduling is a subset of productivity, and, IME, not an exception to the rule about productivity software and Excel.

Or a notebook.