One of the notable aspects of SQLite as a open source project is being open source but not open-contribution. drh put it in public domain, and doesn’t accept outside contributions to prevent it from being contaminated in any way. In an open source landscape where bazaar seems to have mostly won, SQLite remains one of the (last?) cathedral strongholds, and serves as a good reminder to aggressive contributors that open source maintainers don’t have to accept or even consider their PRs.