Forum Discussion
I don't see the modern sites yet.
At Ignite, several Microsoft people said it was only rolled out the 50% of first release customer. It also sounds like they slow down their rollout process when the are "busy" with other high priorities, like getting ready for Ignite. I hope it happens soon, since I'm still waiting too.
Follow the below instructions to try the Modern Lists preview:
To preview modern lists:
Navigate to a list in SharePoint Online.
In the URL bar, add TryNewExperience=true as a query string parameter. Query string parameters are values listed after the address in the URL. A question mark separates the address from query string parameters.
If there are other query string parameters in the URL, add &TryNewExperience=true [ampersand prefix]
If there are no other query string parameters, add ?TryNewExperience=true [question mark prefix]
When you have finished previewing the modern experience, close the browser to reset to classic experience. For some browsers, you may need to clear session cookies to return to the classic experience.