In recent years I've been hand holding more for the kind of mobility you describe but overall I do a lot of my more serious photography from a tripod or occasionally a monopod. In my experience slowing down a bit and using some form of camera support can really help a lot of folks and can improve images compared to always using a run and gun style.Thanks for your thoughts.
That said, I know some folks that exclusively hand hold and deliver great images. I do feel that the time spent shooting from a solid support (and that includes things like bean bags) has helped me even when I hand hold as it taught me to do things like carefully consider my backgrounds and when to get low vs stay high for best perspective and other things. IOW, I have to think a bit harder when working from a support, especially a tripod, but that slowing down and thinking a bit more about things like shooting angle and height translate really well to times when I am hand holding.