Interesting article but the design of the site made reading it give me a headache. I recently also made a move as well, went from Chef to Ansible and I am really happy I did. Chef was a pain.
My major pain point was the complexity of Chef Cookbooks in comparison to Ansible Playbooks. I could hardly wrap my mind around how to write my own Cookbooks after exploring some of the ones I used (Ruby, rbenv, Git, Nginx.) Another major thing for me at least was the documentation, it seemed like Ansible had better documentation to me vs Chef. Finally another thing was the product offerings of Chef vs Ansible. Chef has some paid versions that offer more features, whereas Ansible is feature complete for free and they offer a GUI and Support instead which I preferred.
