My today self is amused by my then self for even taking the trouble to assemble 6 pairs of power cords, let alone doing the listening test.

Conversely, I evaluated 6 different power cords providing power to the bias supplies of my Sound Lab ESLs.  I did not expect to hear much if any difference, but I did hear a hardware store power cord (the stock cord. provided by Sound Lab) come in second to a ribbon type power cord from Maple Shade, which was by far NOT the most costly of the 6 cords I evaluated.  LIkewise, one ought not to generalize that cartridges can in any way be ranked for SQ according to cost. You can do it, but you will be ignoring some superb cartridges.

Some $10K cartridges are very very good.  Some other cartridges that can be had (used, usually) for under $1K are also very very good.  To the point where an experienced audiophile with an excellent system and good ears might prefer the latter to the former, since in the end it is a subjective judgement anyway. However, the analogy between an expensive cartridge and an expensive automobile engine is useless.

+1, Raul.

Is there usually a dramatic difference between $5k and $10k cartridges ?

Yes, the cost.