I guess linux has more docummentation

“More documentation” is a double-edged sword. Under the BSDs, the documentation is shorter, but better; and much of it is also much less complicated, so you don’t even have to look at it all the time.

is performace on bsd better than linux?

It depends.

Depending on what games you play, I warmly recommend “a BSD”, like FreeBSD, which supports both Linux (in the kernel) and Windows (via Wine) emulation.

So is Inspur K/UX, which is a Linux distribution. There is a difference between Unix (the software) and UNIX (the certification).

Not quite. FreeBSD, where much of macOS originates after the merge from NeXTSTEP, is merely “UNIX-like” as well.

I stand corrected.

Unlike Linux.

iPhones

There’s a word for that, “anemoia”.

Not as long as possible replacements aren’t platform-independent.

No

Honestly, GIMP is not a good alternative to Photoshop. I know, “it’s free” is enough for many people, but it … just isn’t.