As someone also have used BeOS and OS/2 Warp, I miss the snappiness of old systems. (I never got my hands on QNX)
What OS nowadays is the closest to that snappiness? Haiku OS? (I'm a happy M1 Macbook user, but it sometimes feel note nough.)
>What OS nowadays is the closest to that snappiness? Haiku OS?
Probably Haiku running native Haiku apps.
FreeDOS, KolibriOS, maybe ReactOS.
I worked with QNX on a floppy and it was the first time, after years of Windows, Mac and DOS in the 90's, that something felt so magical.
Every OS has a delay between mouse click and impact on the UI. Only QNX has ever felt sub 30ms in response time.