Anyone with a cellphone can tell you battery life is an issue. While wireless shifting is interesting I think
a smooth shifting under load and some feedback on what the shift is more important.
I also had a bike that didn’t want to die, a steel alloy Fuji 21 speed, 3 chainrings, lots of duplication in the gears and heavy.
I like the idea on 11 or 12 gears and only one shifter.
My concern is cost. Those systems ain't cheap. And like everything else in the cycling world, there's a new model out every year.
Right now, I've got Shimano Dura-Ace 9000 and SRAM Red. The Shimano's have always worked flawlessly, the SRAM only an occasional glitch. I can't justify the cost of wireless right now. But if I upgrade, that will be on the wish list.