I had every one of those concerns too. In spades. And then I actually tried using it for real, and none of the concerns turned out to cause any problem in pract

I had every one of those concerns too. In spades. And then I actually tried using it for real, and none of the concerns turned out to cause any problem in practice. (Why would I try using something I was confident would make me less productive? Because I felt was in a rut, and was trying out disruptive changes to my workflow. For example the same day, I switched all my calculator tools to RPN. That's not gone badly either.)