What do I know? I am just an old fool.
For spark plugs, platinum plugs offer longer life than regular ones, and iridium plugs offer the longest service life, better than platinum plugs. Oh, and fancy dual/triple/quadruple electrode designs are BS too.
However, it is the right of every car nut to waste their own money as they see fit. If you feel your ride needs these plugs to improve its performance, go for it by all means!