You should be very young then. AMD and Intel were in the same league through 1999 until 2005 (through Barrett term at Intel, if it says something). Before that AMD was cloning Intel chips or fielding chips that weren't that good like the K5. A lot of the IP of the original Athlon wasn't developed in-house too, they were acquired from DEC. Some guys from their design teams came from there too, mostly the A64 guys. AMD didn't develop its manufacturing process too, they bought it from Motorola and then from IBM. Intel does everything in-house. Once these guys left and AMD had nowhere to look to acquire process technology you know what happened: AMD is back to status quo ante, trailing Intel by huge margins and had to finally sell off their fabs.