What are all these limitations of solid steps? Aside from you can't be right up against something and use them?
Our new 5th wheel came with solid fold down steps. The feet adjust to ground imperfections. So far they have been great. Years ago we had a truck camper with the accordion style steps. Nowhere near as stable. Perhaps the tork lift accordion stairs are better than what we had but we have no complaints on the solid steps and wouldn't hesitate to add them to a camper that doesn't have them.