Help!I'maRock!
Mediocringly Derivative
The link you had to JustNick's post spells it out pretty well. There are principles of electricity that simply don't change just because the price and marketing hyperbole went up.
My opinion is the better pickup makers invest in design, prototyping, and some better materials. Some just have good ears and an understanding of how the different elements create certain sounds. Honestly, I'm ok with paying for some of that.
But there's also a lot of pure BS.
If I were making major gear purchases today, I would probably buy very different equipment than what I bought 10 years ago. I think the proof of that is the bass rig I put together this past year. Sans pedals, my entire rig cost $1200. If I were buying 10 years ago, when I bought the majority of my guitar equipment, that number probably would have doubled. Products are better now, prices are better now, buying websites are more familiar now. I'm just glad I'm out of that "rat race" and comfortable with what I have.