It's also a governance issue. Any site or service that's run by a single person, whether it's well-financed or not, is subject to burnout, illness, death, etc.

It's also a governance issue. Any site or service that's run by a single person, whether it's well-financed or not, is subject to burnout, illness, death, etc. Having a team and/or having a succession plan can help insulate from the impact these can cause. I submit as an example Metafilter. Matthowie ran it himself for a very long time but over time built a team that took over when he "retired". It's one of those things that must be put in place well before it's truly needed and doesn't lend itself to last-minute scrambles.