So what happens if the sole author / maintainer gets hit by a bus? I don't see the fact that there are no employees as a bragging point, I see a major business liability.
This. Also, in the age of webapps, I'm starting to find pieces of it becoming more unreliable. I tried to search what tech a company I'm thinking of applying for is using, and because the app itself is behind a login page it had no idea what JS framework was being used.
Other than that, good for him. :-)