I'm sorry, this is simply not true. K8s relatively often introduces breaking changes. They are announced well in advance, which is very nice, but the solution will not take 10 minutes. Take Pod Security Policies and migration to Kyverno of OPA Gatekeeper. Even if you have a relatively simple cluster and choose to stick to defaults rather than write your own rules, it will still take time to understand the new system, to choose the policies you need, to update and test it. In complex cluster this takes weeks and in some cases even months, especially if you are legally obliged to follow change management.