@kwpg3 : Yes, that work was being done overnight Monday & was supposed to be finished by 6 AM Tuesday morning. I don't think this is related to that service upgrade, since we've been working fine since Tuesday morning.
My guess, as someone else mentioned, is that somewhere a construction crew cut a main fiber line. We called, and the automated system said it was aware of the problem & that they will notify customers via text & email when the issue has been resolved.
In the meantime, use your hotspots!