If things are too stressful— take a break. Or leave.
The latter would be especially sad,
but Wikipedia will still be here tomorrow.
It's bigger than me,
bigger than you,
bigger than Jimmy Wales.
So if you start to think you're untouchable
because you're indispensable to the project,
just remember: you're not.
However, there's a good chance that a deep breath and a cup of tea
will resolve the problem that has you stressed.