I like to keep things real. I agree for carpet ripup we’ve done one time worked real well. Also vct, lux vinyl plank. Some sheet vinyl etc. but I’ve yet seen one manufacturer state that some flooring is so well bonded to slab/subfloor that this equipment will not separate the two. The wheels spin. Take Today for example, well stuck hardwood, cut into 6” strips the walk behind scraper did not pry strips up. We used a 11316 Bosch with a 6” flex blade cut in 6” strips for a room that ride on could not go around corner. It did work well enough for the adhesive razor scraper attachment for final pass as adhesive manufacturer stated grinding was not required. So the machines are very useful, I’d say no brainer but all forms of removal tools should be available for use, I started carrying my manual tools, 8” scraper and a wrecker bar for the loose wood to fling off the slab. Even prybars for loose tile. The walk behinds could be considered slow, manual scraping is slower! Top pics are ride on debris.