[geocar]

"Significant" is relative.

What I suggest is available today: and for the cost in time of reading my message will resolve a third of your issues.

I don't know what you mean by "non obvious hidden tricks". People learn what control-C does because they read the manual; because someone shows them. Likewise with other keys and job control. Or the tab key. Or google. Very few things are obvious, and you can find what they are by putting them in a room with a potato and watching: If the potato can figure it out, then it was obvious.