For most of them you can get 720p on Linux with basic stereo audio.
It was possible to play Netflix 1080p on Chrome, but I think those days are gone.
Unfortunately, I don’t see a user-controlled Linux system ever being properly supported in the current DRM / copyright paradigm. There isn’t really a solution that satisfies the “rights holders”, and even if there were, there is little to no incentive to implement it.
Follow up: this is the calculator I use on Linux. I didn’t realize it had Windows builds available.
I would check out Lapce and CudaText. They are both solid editors. If you are comfortable in the terminal, then nvim as well, of course.
cudatext as a notepad replacement. It’s closer to a full featured text editor, but is very quick to startup with no extensions installed.
I have no idea about replacing paint, but irfanview for simple viewing, cropping, resizing, swapping formats, etc.
For calculator stuff I sometimes just open the Python REPL. If you know the language (even a little bit) it does all the things and more. Every time I try to use the Windows calculator it annoys me trying to find the right button and them accidently putting another operator instead of equal or vice versa.
Like many others, I switched to Jellyfin years ago. It is way, way better for me. It does what it says on the tin, sometimes more, but not less.
MakeMKV is non-free proprietary software. It just happens to be free while in beta, which it has been forever. There’s not a lot of great free software solutions that do the same thing, in fact it’s the main (or only) way people extract 4k BDs with the FEL intact.
Reading through the info on the main page is concerning. It sounds like AI slop, or someone writing in that style. No developer writes like that about their project.
If it actually does all the things it says, great. Let me know.