I’m sure tradition plays a big part in the standard banjo tuning being G. But people’s hands are another limitation. A lot (maybe a majority) of players would have difficulty fingering a 28” or 30” string tuned lower. Regardless, G tuning is the tuning.
So it’s hardly surprising that when I decided to build another banjo, I made it shorter, to be tuned in G. It was goodbye to those 3 frets that I was hardly using anyway.
Every banjo I’ve built since is this shorter version: I think it should be the capo-ble banjo standard.