We half of all our QA processes to Fargate sometime around April, more than halved our compute costs. After the big summer milestone there is another big project to move the rest to Fargate. I prefer running my own k8s/kops cluster, but our B team got it stood up in a week and have had no issues in at least a quarter.
You are misinformed. Fargate is out and it works. I have containers running on it right now and they have been for several weeks now. You can select it or the old EC2 approach. Try it, you may like it.