I’ve never worked anywhere that could take a reasonable change window
like apparently can.

We’re in the midst of a scheduled upgrade which will take no more
than a couple of hours. Come back after 2 pm (Pacific) today and you
will see the you’ve come to know and love. For live
updates, please see our `blog`_.

Bravo to their operations team for doing the work during the day instead
of the middle of the night. Of course, they are still working on the
weekend, but this is a start.