Then you pop it on the charger for like 10 seconds, use it for the rest of the day, then leave it charging overnight when you go home.
To me the plug placement was an inconvenience, regardless of how invisible it is to you.
On top of that, it never charged in few seconds after years of use, mine would take longer just to connect to the iMac again.
I was glad to buy magic trackpad I could leave connected 24/7 and never think about it (also I liked it much more than the MM in general).
People think it will be a problem, so make ignorant commentary about it being idiotic, yet in practice it's fine, and not the worst aspect of a terrible mouse.
It lasted so long, even after the warning, that I never got any urgency.