Thanks for correcting me. It's very confronting to not be able to trust my memory, but I'm glad (or I tell myself I am) that at least I know.

I guess I have to take more notes and doublecheck every note I write just in case, but now I should probably find something different than Obsidian to do that in, oof.

PS:

since I did use other closed-source software, like NVIDIA drivers

Open source firmware is almost impossible, so don't give yourself too much shit for that one.