I've also worked on large teams, and for us every published version of every change within our project is automatically tested. If your CI is too expensive to r

I've also worked on large teams, and for us every published version of every change within our project is automatically tested. If your CI is too expensive to run on every commit it probably needs optimization -- something I've done myself a few times. Not investing time or resources into making your CI fast and reliable is a false economy IMO.