Is it really that easy? I just kind of assumed that devs could create subdomains under a dev TLD like googdev123.com, but not google.com until it was a fully-fledged product release.
Agree. I work at Google. I promise nothing happens quickly. It can take over a week to set up a new SQL database & client. Half coding (don't get me started on boq...) and half data integrity and criticality annotations for the data...
I don't know what setting up a new domain is like but I can't imagine it's something you "just do".