The point isn’t that there are solutions to keeping it charged. The point is it’s a needless concession for Apple to make when other wireless mouses have found elegant ways to achieve simultaneous use and charging. This wasn’t an instance of Apple reinventing something that will later seem so obvious.
It is obvious. People will leave wireless mice plugged in all the time out of superstition or worry. Apple’s way elegantly eliminates that possibility. Anybody who wants to plug in their wireless mouse may purchase another.
Yeah, I thought it was a huge, stupid mistake when I heard about it, until I was handed one at work. The charge lasts weeks, it's not like it runs down in a day or two. It's not a major problem.
Plug it in once a month (when it's at ~50% or so) for an hour or two when you finish your day or go to lunch?