What happened to CloudFront after using netlify

I have been following this tutorial step by step, I have first configured CloudFront and linked it in Route53, but when started using netlify we have deleted the record sets that were configured with CloudFront and replaced with the netlify domains, so CloudFront is not used any more?

It’s really up to you. The two parts are pretty standalone. If you want to continue using CloudFront and managing deployments yourself you can. If not then you can switch to using Netlify. Fyi, internally we use Netlify.