Is there a succession plan in place given the bus factor [1] with such a small team? Is anyone else concerned about maintenance if either a normal everyday medical issue came up or in the worst case something unimaginable?
SQLite is not something we wire up and expose bare-ass to the public internet. We don't worry about 0-day security issues in this context. It's more like a wrapper our product uses for structured disk access. Anything that would warrant urgent patching is in .NET vendor or in-house software piles.
If something horrible happened and the entire SQLite dev team was wiped off the face of the planet, I'd make a note to look at alternatives by ~2025.