From your page:
First, I analyzed the circuitry of an old IBanez RG140 guitar which dated back to 1980. Don't worry, that's not old for electric guitars, in fact people pay more to get even older junk - as if any technology was better in the 1950s than it is today?
Old guitars' advantage is not the electronics in it: it is the wood they are made of. A 1980's mid-end guitar possibly has better woods than many of today's high-end guitars. Besides, some of them were handcrafted, and China still wasn't what it is today, so not that many companies were outsourcing production to China (I believe Singapore was more popular back then: the Asian Tiger)
An extremely high number of laws have passed since then that limits exploration and export of certain types of woods (such as Brazilian mahogany), which makes them extremely expensive nowadays.
Other than the quality of the pickups, the electronics in a guitar are so simple, one can compare a handmade American Fender to a mass produced Chinese Squier in that department (everything else is different!)
My guitar is an unknown Spanish brand called "SX", a Les Paul clone, bought in 2008 for cheap. It was sold as having the body made from solid mahogany. I doubted that at first, but once I installed Seymour Duncan pickups in it, and changed the strings for 0.010" D'Addarios, it started sounding beautiful, bluesy, perfect! Then I realized it was indeed made of mahogany: in 2009 the company was raided by some enviromental agents for illegally importing mahogany from Brazil and eventually had to pay an extremely high fine. All of their current guitars are made of crappy woods. My specific guitar has, since then, more than tripled in value.