Not the GP, but I honestly couldn't tell you. A lot probably comes down to tooling, the applications you are deploying, security requirements, etc., as well as how familiar you are with k8s itself.

I migrated PCGamingWiki from running on some Hetzner boxes to DigitalOcean Kubernetes in a few days of work creating Dockerfiles and k8s manifests. I run a Kubernetes cluster at work fairly hands-free that hosts applications critical to our billing operations, and developers on the team deploy new applications with little or no support. Any of the issues I've hit are an artifact of migrating legacy applications not designed to run in more-or-less stateless environments, which is why the PCGW Community site still runs on its own server (Invision Community sucks).

I really don't see all the issues people have that aren't due to a mismatch of application design vs target environment (and no, it's not monolith vs microservice - monoliths run just fine on k8s; but you should be designing your application with a 12-factor environment in mind) or a misguided notion that you will be drowning in YAML hell (it's real, but you can manage it - and it's directly related to the complexity of the services you are deploying).