They hid it very well, two-thirds down a long list of changes and screenshots, but what was already inevitable is now reality.
Similar to Windows 11 Home edition, Windows 11 Pro edition now requires internet connectivity during the initial device setup (OOBE) only. If you choose to setup device for personal use, MSA will be required for setup as well. You can expect Microsoft Account to be required in subsequent WIP flights.
In other words, installing Windows 11 Pro will now, just like 11 Home, also require a Microsoft Account and thus an internet connection. You didn’t think pro users would be safe from big tech’s data hunger, now, did you?