I'm watching it now, and it's sitting at 0%. Considering it does poll for emails from time to time (maybe 1x minute) I don't thinks it bad that it ramps up to 0.1% to do so.

Discord, Teams, Firefox, and Slack all seem to use 0-0.1% without much interaction (though I am typing into Firefox right now!) - Thunderbird seems to be 0% more often than not.