Everything depends on DNS....
>circa 2025: grayed out on Hacker News
United we fall.
https://docs.aws.amazon.com/whitepapers/latest/aws-fault-iso...
There's no way it's DNS
It was DNS
Actually, many companies are de facto forced to do that, for various reasons.
It means that in order to be certified you have to use providers that in turn are certified or you will have to prove that you have all of your ducks in a row and that goes way beyond certain levels of redundancy, to the point that most companies just give up and use a cloud solution because they have enough headaches just getting their internal processes aligned with various certification requirements.
Medical, banking, insurance to name just a couple are heavily regulated and to suggest that it 'just means certain levels of redundancy' is a very uninformed take.
What's more likely for medical at least is that if you make your own app, that your customers will want to install it into their AWS/Azure instance, and so you have to support them.