Because I noticed my old Core 2 Quad PC with Nvidia 8600GT that my parents use as their email and Facebook machine, doesn't boot with any linux newer than Kernel 6.1 even though I can get Windows 11 to boot on it.
So the myth around "Linux is great for old PCs", highly depends on what HW you have.
But by modifying it right? Because the core 2 does not support SSE4.2