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Yeah, but now you don't need to bother will all that troublesome hiding and drilling and routing.
Yeah charging stuff sucks, but the longest rides I'm ever likely to do on a bike with wireless shifting is 200km. I agree that it might not be the best solution for you, but you're a f̶u̶c̶k̶i̶n̶g̶ ̶n̶u̶t̶c̶a̶s̶e̶ statistical outlier.
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all that troublesome hiding and drilling and routing
I ride a Shiv, it's Di2 compatible so there's certainly no drilling and the hiding/routing is done when you do the brakes through their purpose built Di2 cable tunnels. Cable hiding arguments are not going to win me over to spending £2k on a wireless groupset..
Junction boxes can be hidden (seat tube or in stem like TriRig), so can all the wires except maybe the rear derailler one but even that can just be run along the hanger if you want and it's still smaller than a gear cable.
Charging anything on bikes sucks. Having to charge my shifters mid-ride though is taking the piss.