Not too uncommon. This (used to be?) is the case for timezones[1]. Even xkcd has joked about it [2].

I think in software once there's one great, free implementation of a hard problem there's a tendency to stick with it. If that project is maintained by one person, then so be it.

1. https://onezero.medium.com/the-largely-untold-story-of-how-o...

2. https://xkcd.com/2347/