Very true, especially because taste (and the calibration of the grinder you receive) don’t always line up with the grind size distributions you see other people make from experimenting. For me it’s always had to be one at a time, compared to what I was using before and returning if the intended upgrade isn’t satisfactory.
It would be amazing if coffee shops started doing equipment tastings/comparisons as well as beans. We have a lot of cool cuppings/tasting courses here, but nothing for hardware.