Your i7s 2.5 years apart get a ~25% improvement in benchmark ratings. A PC with an 80286 was like 4x faster than a PC with an 8088, and they were about 3 year

Your i7s 2.5 years apart get a ~25% improvement in benchmark ratings. A PC with an 80286 was like 4x faster than a PC with an 8088, and they were about 3 years apart (1979-> 1982 chip introductions, the computers were later for both). And not just 4 times faster in some tests, an 80286 was much faster at everything in a way any consumer could see. Only programmer is going to buy a new computer for a 25% speed increase. The pace of improvement is slowing.