I was excited when I read in the Get-Help about_commonParameters article that one can set true or false on a switch parameter. Previously, I thought that it was false unless specified. Now I see that if one adds a colon and a Boolean variable, then the switch can be set to false even when specified. It looks like this:
There were several cases when I didn't know whether I would need a switch or not, and I had convoluted code to form an expression which I would then invoke. Now it is much cleaner.
So reading those long about_* articles does have its benefits!