Where I've mostly seen bar ends is on bikes with MTB style bars, including hybrids, being used on pavement. I also see a lot of people trying to make straight b

Where I've mostly seen bar ends is on bikes with MTB style bars, including hybrids, being used on pavement. I also see a lot of people trying to make straight bars comfortable in other ways, e.g., with their palms cupped around the ends of the bar, or fists resting on top of the grips. Granted, it's probably a matter of every rider having different requirements, and you can eventually find a bar that's comfortable and performant for your body and riding conditions. But that means trying out different bars, having to remove all of the controls, possibly lengthening the cables, etc. Or you can add a simple accessory that will at least provide a resting position, that can be attached with minimal tools and effort. In my own case I ended up with swept bars on all of my bikes. Even a moderate amount of sweep, and the resulting change in wrist angle, is night and day for me in terms of long term comfort.