My experience contradicts your hyperbole. Over the past two decades I've been part of several fail overs with active/passive and build from scratch DR solution

My experience contradicts your hyperbole. Over the past two decades I've been part of several fail overs with active/passive and build from scratch DR solutions. Most succeeded. The ones that didn't succeed on the first attempt did so on the second one. Not a perfect track record, but it does happen with proper documentation, testing, and skilled staff to handle it.