Jane - I also have static problems. It’s frustrating when a slip adds to the problem, as that’s most of the point in my mind.
I have had shorts that have really worked well in past, and others I’ve tossed into the trash in frustration. It’s crazy how some have been so good and others worthless.
I also can’t stand the slip peeking out at bottom, and have definitely adjusted where it sits at my waist to avoid it being seen. When I was in college I wore a lot of short skirts. I actually found a slip that ended just under my bum. I don’t have that one anymore, but it shows how I wore them even then.
I purchased a slip for my DD because she had a dress I found too sheer without it. I don’t think she’s ever worn it with a different dress, so I doubt she will ever wear a slip as a regular practice. TBH, she’s not into dresses at all right now, so maybe a moot point anyway.