AMD was founded at almost the same time as Intel. X86 didn't exist at the time. But yes, AMD was playing the "follow x86" game for a long time until they came

AMD was founded at almost the same time as Intel. X86 didn't exist at the time. But yes, AMD was playing the "follow x86" game for a long time until they came up with x86-64, which evened the playing field in terms of architecture.