I looked on You Tube, and there are 3 popular machines, JKO, SB, and Rhino
All the videos except this one, are 7 or 8 years old, not high def, really shitty resolution, none show real world testing and cleaning.
I mean 4 years of dirt and grime pounded into a floor mat, that a pressure washer and hand scrubbing won't completely clean out. I mean small white dog hairs in black floor mats.
When I was working for a small company that detailed rental cars, and fixed the windshield cracks, we had a steam vac, it was a monster.. and it was really good at cleaning carpets and upholstery.
Of course, there was hand scrubbing, and shampoo... but that steam vac did great work https://justacarguy.blogspot.com/2010/10/wet-and-dry-vac-with-some-cleaning.html