I'm not sure if you're just being pedantic, but "the bus factor is high" in this instance means there is a high level of risk to the health of the OSS projects he maintains if he were to get hit by a bus.
I don't think he's being pedantic, it's the opposite of the general usage. The bus factor is the number of people that have to be hit by a bus to cause real problems for your project. Higher is better.
> The "bus factor" is the minimum number of team members that have to suddenly disappear from a project before the project stalls due to lack of knowledgeable or competent personnel.
