Right, like I said: crazy. Anything production with certain other clouds must be multi-AZ. Both reinforced by culture and technical constraints. Sometimes BCDR/contract audits [zones chosen by a third party at random].
The disconnect case was simple: breakage was as expected. The island was lost until we drew it on the map again. Things got really interesting when it was a full power-down and back on.
Were the docs/tooling up to date? Tough bet. Much easier to fix BGP or whatever.
