There's no reason for software to be slow anymore

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LLMs have essentially made any language above the C++/Rust systems level tier obsolete. The only reason you picked a language like C# or Python is often out of convenience of having a broad ecosystem or due to the lower level languages being too hard to master, with too many footguns. The tradeoff being is that you got a less performant implement, while being easier to write. Nowadays, those arguments are dead.

LLMs can now write perfect code in low-level languages, that is frankly _safer_ and _exponentially_ faster than implementations in high-level languages.

Software will get slower as we do things beyond the current hardware capabilities which is always the case as hardware improves.

I had an Odin code base with raylib doing cpu bound stuff. On Catchy OS it tanked my frame rate from 120 to 90 fps (intentionally, seeing what I can get away with). Same build, on Windows 11, 40fps.

the OS makes a huge baseline difference