(Alert: My HO experiences follows!)
Got my first "walk around" throttle (a "Troller") waaaay back in the mid-1970s. Hooked it up... and I've never had a layout with stationary power since. For a larger layout, especially with peninsulas, the ability to walk along with your train is the compelling point to me for "walk around" control.
Plus, the type of railroads I model don't have dispatcher controlled powered switches. All manual.
Therefore, the ability to stop the train, manually line the switch, and then start the train slowly and creep into the siding is part of the operating fun to me.
HOWEVER...
YOUR MILEAGE MAY VARY. (So don't get yer panties in a wad!)
Andre