Non-Dell compatibility statements have nothing to do with your Dell warranty and what Dell will support. If your Dell PC model is NOT on Dell approved PC list =Dell computers tested for upgrade to Windows 11 Dell is not testing the device and drivers will not be upgraded for that model.If you install Windows 11 on a non-supported model, the only support you would receive from Dell Support agents would be to run the pre-Windows ePSA diagnostics.
I'm sure there will be many questions regarding this over the next few weeks and months, and more angst when people find out that their not too old computer isn't up to running Windows 11. From the current questions regarding TPM 2.0, I can assume that people are already considering this.  It's easy to check whether you have TPM 2.0.  Press Windows Key + R, enter tpm.msc in the popup box and press enter.  If your computer has TPM 2.0, then a box similar to that below will open.  This is for my Dell XPS 8940 and it can be seen that this does indeed have TPM 2.0. [IMAGE] I've done this for both my Dell XPS 8900 and XPS 8940 and both have TPM 2.0. So first hurdle crossed successfully, on to the next. So Microsoft have released an App that you can download and run to check whether your PC will be compatible with Windows 11 here.  Scroll down to the bottom of the page - it's under Check for compatibility. So running this for my XPS 8940 gave me the thumb's up.  But the App reported that my XPS 8900 is not capable of running Windows 11.  Looking in detail at the requirements, this is probably for 2 reasons: Looking at the range of Dell XPS desktops to-date, it is likely that only the XPS 8930 and XPS 8940 models will meet the requirements for Windows 11.
Will our Dell XPS desktop computers run Windows 11?