A charge lasts me about a month of all day use, so this is still a non issue for me. Let's see how long until the battery becomes weaker. Enjoyed working with the mouse for a year so far.
Honestly, the battery status is within reach of just a single mouse click in the Mac OS menu bar, I check it maybe once a week. I think there is even a warning when it reaches very low levels. In the rare case I forget to charge and run out, it is enough to charge it for like 15 minutes to keep working for the day.
Many people are not as responsible as you, and for them Murphy's law means they'll be mouseless at the worst time possible every month.