[art0rz]

My Bose headphones also aren't usable while charging. Very frustrating. I don't care if there are technical reasons. It's just bad UX.

[Biganon]

Same with my Sony headphones. Never understood the reasoning.

[fph]

Allegedly, for the Mac mouse the reason is so that people can't use it permanently plugged in, because cables are ugly and against "the Apple philosophy".

[arscan]

My cordless beard trimmer doesn’t run when plugged in, so you have to wait for it to charge before using it. When getting ready in the morning, you can’t sit around for an hour waiting for it to charge enough to function.

It makes no sense.