Most Linux devs have been corporate employees getting paid to develop it for a very long time. It's not the early 90's any more.

Linux is decent for its core use cases, but it is far from a solid pro-grade OS in a lot of areas... and in the areas it did get there, it took a long time to get there.

If those people build cores like linux kernel is built design-wise, i will PAY to watch the spectacle.

You do realize that Linux got basic SMP support 3 years after NT, and it was shaky for a while after? It still does not have reliable sleep-wake. And it only added native async file i/o in 2019, while NT has had it on the same hardware since 1993? So.. i'll expect an in-order core with an IPC south of 0.5 that cannot exit low power sleep 30% of the time in a decade or so.