if you get a coreboot compatible laptop you can burn GRUB into your firmware so that it can’t ever be destroyed by windows.
Then you can boot into linux by having GRUB load the /boot/grub/grub.cfg file in your linux FS, or load windows by chainloading into another payload in firmware (e.g. SeaBIOS) that can load windows.
This is kinda advanced though, and there is a big limitation in that you can only run BIOS (not UEFI) because EDK2, which is the only coreboot payload that can do UEFI can’t be chainloaded into from grub
if you get a coreboot compatible laptop you can burn GRUB into your firmware so that it can’t ever be destroyed by windows.
Then you can boot into linux by having GRUB load the /boot/grub/grub.cfg file in your linux FS, or load windows by chainloading into another payload in firmware (e.g. SeaBIOS) that can load windows.
This is kinda advanced though, and there is a big limitation in that you can only run BIOS (not UEFI) because EDK2, which is the only coreboot payload that can do UEFI can’t be chainloaded into from grub