Frustrating and unproductive day for those trapped in CI driven development mode. Mild annoyance for the rest of us.
Of all the *DDs, this is one of the few that is done without much complaint or major problems or controversies around it.
I also know countless people who work outside of CRUD world who rely on CI. The only exception I can think of are scientists who, well, tend not to use version control beyond folder naming. Not that I blame them, on the contrary.