Kubernetes is one of the most powerful pieces of infrastructure software ever built — and one of the most over-adopted. The honest question is not whether it is good. It is whether you have the problem it solves.
A cloud bill rarely grows from one big mistake. It grows quietly, from a handful of recurring causes nobody is watching — until finance asks why the number doubled. Those causes are well known, and genuinely fixable.
Serverless and containers are the two main ways to deploy a backend, and the choice has real consequences for cost, speed, and how much your team has to operate. Neither is universally better — the workload decides.