It is mentioned in the article.
"Fast forward a couple of months, podman-machine is now deprecated in lieu of Vagrant"
"Fast forward a couple of months, podman-machine is now deprecated in lieu of Vagrant"
See Marcos install https://podman.io/getting-started/installation
Also there are active issues and PR related to `podman machine`.
Any virtualization solution could be used, with some more typing (like running the shell commands directly). It's not unique to Vagrant.