Sure. That became Container Linux. Now we have Fedora CoreOS, which combines tech and ideas from both Atomic Host and CoreOS/Container Linux. It uses Fedora packages but through rpm-ostree, not with the yum/dnf system you might be used to.

Since CentOS Stream and Fedora brances will exist in the same git system, I can see future Fedora CoreOS making use of slower-moving CentOS Stream branches where useful. But that's all to be worked out.