In fact even Windows 95 had preemptive multitasking
No, it didn't.
which is absent in MacOS 7 and wasn't added until MacOS 8.6.
No, it wasn't.
From an operating system angle MacOS has been traditionally poor with no real process control or no real memory management (any Mac user will tell you the "virtual memory" system is shit) being a hacked up mess dating from 1984 with kludges stuck on the side. It's superficially pretty but ugly under the hood.
Which is also true of Windows.
But MacOS X is based on BSD UNIX/Mach with a radical new userinterface and I, for one, would rather use it than NT.
It is not a "radical" new user interface. It is the same WIMP interface with a lot of expensive (in terms of CPU) chrome grafted on.: -- A quote from Petro's Archives: ********************************************** "As someone who has worked both in private industry and in academia, whenever I hear about academics wanting to teach ethics to people in business, I want to puke."--Thomas Sowell.