AMD and Intel both have open source video drivers and I really doubt anyone has cloned them.

The non-free features for the Nvidia cards and many other chips are achieved by the card itself running closed source binaries. It is actually probably a better way to protect IP anyway since no one can decompile the encrypted binary (well until recently...).

Open source and proprietary software exist as a duality. It's not an absolute expectation that everything will be open source but Nvidia is very late vs its competitors.

Google, Windows, macOS, etc. all have large open source parts. Games are kind of an exception because they are treated like a single work of art. Also, crucially no other software or hardware has a game as a dependency so interoperability isn't a concern.

You mean, like Intel GPU drivers with just the libre free-as-in-freedom kernel and MESA? Blender? Krita? Cinelerra-CV? Darktable? ImageMagick? FFMPEG? KVM/Qemu? Most programming languages and frameworks? Clang/LLVM?

WTF are you talking about?

If any, science today it's made thanks to FLOSS software, propietary software it's the exception. And the trend it looking worse for propietary environments.

Money will come from support and integration, not for the software.

A complex, scientific related reproducible ad-hoc environment for Guix may cost a little more on a single PC than a a propietary OS license and setting up the rest for yourself, but you will be able to replicate that setup everywhere and forever and on a guaranteed basis that once your paper/experiment it's replicated, yo get the same environment no matter where and how. That's the difference.