That is kind of the UNIX philosophy at work and you'll find that in a lot of open-source and self-hosted projects. The goal is to do one very specific thing really well in a small and streamlined package that integrates into other processes in a clear, defined and transparent way, not to be one of these super-convenient but bloated "it does everything and the kitchen sink" behemoths. It's a different style of software development but it's popular in the open source community for a lot of reasons, for example it's a lot more maintainable by a single person or small team with limited time. You'll find most of these large complex open source projects are organized and developed by companies (like Pangolin is), while the smaller UNIX-style projects are often written by individuals or very small teams volunteering their spare time. There are tradeoffs in either direction, but for self-hosting I think following the UNIX philosophy has a lot in common with a typical goal of self-hosting, reducing your dependence on for-profit companies that have a financial incentive to enshittify or otherwise try to squeeze money out of you.