The much maligned “Trusted Computing” idea requires that the party you are supposed to trust deserves to be trusted, and Google is DEFINITELY NOT worthy of being trusted, this is a naked power grab to destroy the open web for Google’s ad profits no matter the consequences, this would put heavy surveillance in Google’s hands, this would eliminate ad-blocking, this would break any and all accessibility features, this would obliterate any competing platform, this is very much opposed to what the web is.
My experience is that Nvidia plays nicer without secure boot. Getting Fedora up and running with the proprietary Nvidia drivers and fully working SecureBoot was quite a headache, whereas everything just worked out of the box when I disabled it.
But this is very much an Nvidia problem and not a SecureBoot problem. There is a reason basically no-one else provides their drivers as one-size-fits-all binary kernel modules.