With regard to rebase and fossil vs git when you have a small team of trusted developers rebase is harmful because you lose information that could help you understand the _why_ of something. In contrast if you are working with thousands of untrusted developers you need a way to increase the signal-to-noise at the cost of some granularity.

This comes about from their development styles (see: http://www.catb.org/~esr/writings/cathedral-bazaar/).

- Use fossil if you prefer the cathedral style of development SQLite is open source but does not accept contributions.

- Use Git if you prefer the bazaar style of development. You want to accept hit-and-run style contributions from anyone.