There was a side by side comparision video (on twitter, cannot find) with Win11 with modern HW and Win98 with then-modern HW, cmd, explorer, notepad, paints, calculator all started instantly on older Windows, while on 11 every app has startup delay, and then also "paint UI so its all shown and responsive" delay.

Also hardware input lag definitely isnt better, and many times worse than in past: https://danluu.com/input-lag