This would make sqlite3 module unusable for many users. We have already increased the minimal required version in 3.10 and am opposed to do this change.

I also don't understand what part of msg370266 made you think that this is a reasonable change. The gist of the previous version increase was a failed test in older SQLite versions. As far as I'm aware, there is no such an issue to warrant such a step increase for minimum version requirement (from 3.7.15 to 3.26.0)