This is a sobering post that revisits the notion that given a project, how many developers have to be hit by a bus before it stalls.
According to the methodology explained in the article, in 2015 it took 57 developers for the Linux kernel to fail, now it appears that it takes 8.
That’s not good.
Two different concepts.
You’re talking about work slowing because of increased overhead from more people needing to communicate and make decisions.
The OP is talking about the"bus factor". How many people can leave the project unexpectedly and still have the project survive. E.g. if only one person has access to merge changes, the bus factor is 1 regardless of how many people actively contribute.