Saying it won't roll out to Win10 users through Widows Update is not the same thing as saying Win10 users can't upgrade on the day Win11 is released. Right now there are two ways to get new Win10 builds onto your systems: Use the media creation tool or wait for the new build to roll out through Windows Update. Win11 will follow the same path. Those who want it on Day 1 can get it and upgrade from Win10 via a W11 .iso created by the Media Creation Tool, or wait for it to roll out via Windows Update, which typically takes a few months for new Win10 builds. Rinse/repeat for Win11.
As well, since Win10 will not EOL for at least 3.5 years from now, Win10 users will be able to turn down a Win11 upgrade through Windows Update, no doubt.
I am due for my first Win11 beta build this week, through the Insider's beta group, which will upgrade on top of my current beta Win10 build, 21390.2025, according to Microsoft.
I still can't understand why 64GB of drive space for Win11 upsets people. 250GB NVMe drives sell for $100 or less, and 1TB 7200rpm platter drives sell for $50 or less. Does anyone still sell systems with < 64GBs drive space?