This looks to be primarily focused on simplifying the stack for improving security and efficiency for a handful of edge cases.

I’d expect it to only be noticeable in scenarios where the software has been optimized for extreme i/o or significant context switching.

On an ordinary personal computer or a gaming computer probably nothing. For a server farm I could imagine this helping, but I can’t put a % on it. As there’s too much variance to speculate without hardware to experiment on.