The years when Pentium came was a bit of an shitshow. As the article said, there were 7 companies producing 486 processors but after that the market was mostly Intel, AMD and little Cyrix. Then came socket-A vs. slot-A etc. Now looking back it seems like there was lot of changes in short period of time.
Things started progressing so fast in mid nineties that brand new top of the line computer was being matched in performance by low end offerings 2 years later. Lasted up to late 2000.
December 1998 $85 Celeron 300A handily beating June 97 $594 Pentium 233 MMX, not to mention overclocked one matching 1998 $621-824 Pentium 2s.
January 2002 $120 Duron 1300/Celeron 1300 beating 2000 $1000 Athlon 1000/Pentium 3 1000-1133
June 2007 $40 Celeron 420 overclockable out of the box from stock 1.6 to 3.2GHz beat best $1000 CPUs of year 2005 (FX-57, P4 EE).
Same goes for Graphic chips starting around 1998/9.