> Cloud services are costly but in most cases you'll pay similar cost in terms of time and in some cases lot more if you pick something complex that you don't know about.

Even just something like EC2 instances is costly - and a surprising amount of stuff in the cloud is just containers or EC2 instances, before redundancy even. Adding in specialized services makes things even more costly.

Problem is that nowadays it's hard to find a team that knows how to properly handle hardware - if you manage to get a handful of people that know how to do that cloud is only sensible for very few edge cases.

And as the article states - in many cases you probably don't even need all that fancy from K8s. I can for the cost of using K8s cloud stuff just put a second copy of our hardware in a different DC (or maybe even a third one), and just fail between DCs if needed. Way simpler setup, and excludes a lot of failure cases I'd catch with a K8s setup.