Has anyone found any well-made, soft-side bags in the +/- 25" long size range (larger than carry-on) that have wheels, an extendable handle, AND shoulder strap? I've seen some on Amazon made by smaller companies but apparently they're cheaply made (per reviews of stitches ripping after a use or two). I haven't yet found any made by companies I know are reliable, but may be missing some.
The only reason we haven't switched to wheeled luggage is the lack of shoulder straps (or a way to add them), as far as I've seen so far. For us, a shoulder strap is an absolute necessity for walking in areas one can't easily wheel, like rough cobblestone streets, up many flights of stairs, in crowded areas where you don't want your bag trailing behind your line of sight, etc. We can each carry even a large, heavy duffel on our shoulder for a good while, especially with some hand assist on the strap, but I can't do it just carrying by hand. And we don't like traveling with backpacks... we don't feel secure in crowded places with bags on our backs, and are too prone to turning and whacking people in the face with them (sorry, can't help it).
We don't need wheeled carry-ons. we're strong enough to carry those anywhere. But sometimes we need the larger bags given what we need for work and hobbies.