Of course thinking on stuff like this sometimes can “evolve”. 
Now with the sulky on way in I got to wondering about the Bradley 48" stand-ons. A stand on, after all, is not so much different than my mower trailed by a sulky. Bradley offers two 48" stand ons, one has the better Vanguard engine. It is quite expensive and obviously is intended for commercial, professional, mowers.
But they have a new 48" stand-on with the same Briggs 25hp Commercial Turf engine I have on my walk-behind. I think that engine is more than adequate for non-commercial home use. And that new, less expensive, stand-on is on sale now for four grand. Here is a link:
Q: So shin, are you wishing now you had a stand-on instead of your walk-behind and sulky?
Naaa, I’m still good. I wish I had the larger rear tires on that stand-on though. People really seem to like the stand-on mowers. I think they are OK, but it is better to walk. One thing absolutely for certain, either walking or standing surely does beat sitting all silly.