When I was a kid I had the standard one-speed bike with the upright riding position. At some point, I bought a "ten-speed" because it was the main style available. I remember not liking it. I didn't like the riding position, I didn't like the narrow handlebars. But I got used to it and had that style for some decades. In 2002 I bought a mountain bike for commuting, used it for a year or so, and then got back on a road bike one time for some reason. All over again, just like 40 years ago, I didn't like it. (I didn't hate it, just didn't like it in comparison to the mountain bike feel.) So that's my reason, in addition to many of the above.