I would like to agree. My Yankee sensibility tells me I don't have to spend hundreds of dollars when the goal is simply to stand up at my desk. For the few times I need to sit I can use a stool as you suggest.

That said, I've been sitting at desks for decades. I'm a little reluctant to buy or build a high desk with the assumption that I will be able to stand at it all day and be productive. The adjustable desks give you a "way out" even if it's just for a few hours a day while you get used to it. I think that's why they are popular. Few people want to commit to a change like that and all the ways to "Try" a standing desk are nearly as much effort as the ~$500 is worth. especially if you are counting it as business or office expenses as I would.

In my case it would be $85 for the stool, plus a few hours labor and materials to build a little stand on top of my existing desk which includes a trip to the lumber yard. Then if I like it I go out and buy a permanent standing desk for about $150 and I'm rapidly approaching the same cost as if I had just gone and bought the adjustable desk in the first place.