If my company is any indication, they're going to make more money since everyone will simply check the multi-AZ or multi-region checkboxes they didn't before and throw more money at the problem instead of doing proper resiliency engineering themselves.
It doesn’t matter how much of resiliency engineering you do. Having everything in a single AZ is a risk. If this is acceptable then it’s fine if not you need to think of multi az from day 1.
