So many defenders of Intel here. They may be best now but consider this: from 2003 until 2006 AMD had the superior design because NetBurst was awful and Intel were also in the Rambus scam.
Of course, Intel had the deeper pockets and hence had better fabs so were able to mitigate some of NetBurtst's awfulness by being a node ahead of AMD and also of course AMD made mistakes. But when big Intel didn’t just spend its money on fabs and R&D; they also used it to bribe manufacturers to not use AMD chips and similar stuff for which they eventually had to settle but long after the damage was done. We will never know what might have happened if for instance Dell had used AMD processors back in the P4 days. It is possible that AMD could not have coped volume-wise but it is equally possible that the extra revenue might have enabled them to compete and today we’d be looking at a 60/40 split for x86 revenue vs the current 80/20. And for the die hard Intel fans: if Intel ‘only’ had 60% marketshare do you think they could afford to cripple / segment their chips to the same extend as they presently do?
And going back further: x86 is the most successful pile-of-c**p architecture of all time. Let me clarify that: 8086 was junk, 80286 was junk, 80386 was junk, 80486 was junk, the original Pentium was junk. 'Junk' in each case being a relative term in comparison to what was available at the time: 8086/286/386 vs 68000/68020/68030 etc., Pentium vs PPC and that's without bringing any other ISAs aside from Motorola and PowerPC into the argument. Has everyone forgotten just how awful Intel's 8/16/32 bit modes were? 64KB pagefiles, shortage of registers and so on.
But because IBM choose x86 for the PC, Intel has been able to use that huge revenue to eventually out-design everyone else: Motorola, Alpha, PPC all left the PC CPU business not because their ISA couldn’t be made to compete but because they lacked the scale. Yes, Intel has some bright people but anyone who knows the history of PCs in the 80s and 90s knows that the badly designed x86 ISA has a lot to answer for.