No stories. Just reading the articles from other folks.
"Similar to other Xboxes (and unlike Sony consoles), an online connection is mandatory to get going, and the process here is exactly like Xbox One - which is to say, time-consuming and rather frustrating."
Xbox Series of Consoles Review - Eurogamer
Edit - Updated with more:
Here is another data point.
"Yes, there's a system software update to download -
but it's not mandatory and you're free to examine Sony's early UI if you want to."
PS5 Console Review - Eurogamer