Linux, which is based on UNIX and implements POSIX BTW without x86 there would be no Linux and what about the Von Neumann architecture? How far back should we

Linux, which is based on UNIX and implements POSIX BTW without x86 there would be no Linux and what about the Von Neumann architecture? How far back should we have to go? Elementary doesn't even force you to pay, you can use it for free (as in freedom as well)