Yeah, that's why we went with a third region instead. But, at the end of the day, if _only_ changes are affected for a couple of hours, that wouldn't impact the service that much
What I did once I was in the position of _having_ to provide that level of support, was to run the pipeline in a third region, different from the "prod" ones. That way, worst case you can't do deployments during the outage...
Another alternative studied was to use a thirdparty ci/cd service, outside of our network. It was discarded bc you never know where that would actually run
My last two (severely low end) cars had a function that opened slightly one window when there was just one door open,for this reason... To allow the last door to close without excessive force.
On one of the cars it wasnt enabled from factory, but I asked the dealership and they enabled it at no cost.