Well, from what see the authors exchanged AWS managed Kubernetes cluster with self-hosted Kubernetes cluster on Talos Linux. Question is if $449.50/month paid for AWS will cover additional work needed for self-hosting.
All the effort that previously wasn't required for operating EKS, but now is required to operate self-hosted Kubernetes, will be pushed to existing engineers as a bit of extra work, with no extra pay.
In the best case scenario. In the worst, some cluster f-up will eat 10x that in engineering time.