Why is Not Linux More Popular on the Desktop?

Why people don’t use linux as desktop and why it is not popular for desktop and people use windows

What is the major difference between cache and registers?

Computers can drive cars, land rovers on mars, and can answer many questions. But, are there any questions that a computer can never answer?

Is hibernation not good for computer?

I just been told by our IT guy that putting the computer on hibernation instead of shutting it down is not good for it. Is it true? What happens to my computer if i only use hibernation? Thanks!