I well remember the 486SX/2-66's and how terrible they were. I liked to say that Compaq put the "sorry" in Presario.
In the late 90's, between around 96 and 98, I made good money building AMD 486 DX/4 133's. Those things were blindingly fast for the price. As I recall there was even a 150MHz variant.
Still, my favorite CPU of all time remains the AMD K6/2-450. It wasn't until the Phenom II BE950, a dual core that I unlocked to quad core , that I felt I had a CPU that matched the K6/2-450 in value. Since then I've had a couple of Ryzen's for my daily driver/work machine, and couldn't be happier. AMD has done a fantastic job keeping price and performance in tune. But, it goes even further if you shop smartly.
Overall, this was an excellent read, and brought back a lot of memories. The 6x86 for example- too much promise for what they actually delivered. And, thanks to this article I now know why so many cheap motherboards had their CPU's soldered. It wasn't a technology decision, but a legal one. I had no idea of that at the time.