The negative impact is not on the average Linux user who just runs a distro, but it will be bad for anyone who wants to compile and run their own kernels. It w

The negative impact is not on the average Linux user who just runs a distro, but it will be bad for anyone who wants to compile and run their own kernels. It will be bad for the average Linux user, because whoever has the signing keys can decide what Linux distributions a user can run and what versions not. Let's not forget that e.g. Mint also started out as a distribution with a tiny user base. They are now big, because users could install and try Mint. In a UEFI world without unlockable boot loaders it's game over for OS competition, because parties can be excluded because they are too small, too competitive, or just because.