Yeah, I get that, and I'm fully on your side. SQLite would have been a nice fit. The only downside is the delta compression problem. Creating an extension for SQLite works, but it's slow. I had two options:
1) Do the delta compression and caching and so on on the pgit side and lose SQL queryability (or I need to do my own), or
1) Do the delta compression and caching and so on on the pgit side and lose SQL queryability (or I need to do my own), or
2) Use postgres