>>Philpa+(OP)
I'm surprised at how many people seem to focus so much on the effect of incoming PRs that require some mentoring to get them to a mergeable state or on "entitled users". I don't think those are significant contributors to burn out in the Rust project.
Those you
can ignore. More significant is "X is important, but I'm the only one that thinks so, so I have to carry X to completion single handedly".
That causes a lot of the demoralization and heartache and guilt that contributes to burn out.