I don't know if I agree with that. Math is the language used to express Physics concepts. Physics is a conceptualization of the fundamental laws of the universe
this is probably the least helpful de-googling video
I don't think it was supposed to be particularly helpful. It's more of him sharing his passion with his audience. Which isn't going to be interesting if you don't care about him.
Out of curiosity I did a quick test with Sennheiser Momentum 4 using 1000 kbps flac and I personally couldn't hear a difference that I wouldn't call placebo.
If I wanted to I could convince myself that BT sounds better. But there really was no difference in quality. Only the tuning might be slightly different.
One cause of a difference could be whether the headphones use their built-in DAC or the phone's.
There really is no perceivable difference in audio quality between wire and bluetooth. Especially considering most people use Spotify. Also most consumer headphones aren't great; you'd have to use audiophile level gear to maybe hear a difference.
My 7900XT works reasonably for 4k well in most games - though admittedly I have to turn graphics down to Medium in alot of cases to get 100-ish fps with upscaling and frame-gen on quality settings. Except Cyberpunk, it ran really well with high settings.
I'd guess in about 3 years it should be much better
I never understood test driven development. Yes I do usually write tests for my code, but only after I've finished writing my code.