I got curious and searched up your examples. While the StarBook looks like the most compelling alternative to the Framework laptop with coreboot and good repairability they don't seem to feature any modular ports, which is arguably what sells the Framework laptop for some people. Even for me, the thought of being able to swap out a USB-C charge port for a SD card reader is very appealing.
The other one, the PrimeBook Circular, doesn't appear to be on sale anymore? Their website is gone and an empty parking page loads.
Define "easily"? Non-tech-savvy users will never even touch an install USB or know what regedit is. They'll just see the dialog saying "your computer doesn't support Windows 11", chuck it in the bin, and buy a new one.