I can easily tell that the espresso I pull from my $2000 dual boiler machine is superior in taste and consistency to what I could pull from my $700 machine. I can tell that the $800 burr grinder I now have yields more finely ground espresso for my shot, yielding a smoother extraction, than my old $300 grinder. However I can also tell that the drink made from $2,000 titan grinder and a $20,000 two-group espresso machine from Intelligentsia and Blue Bottle are better than the drinks I make at home. But on an absolute scale, the jump from my entry-level to enthusiast-level home setup yielded a vast, dramatic improvement. The jump in taste quality from my enthusiast-level setup to truly professional level setup is not as pronounced. Certainly not enough to warrant spending nearly 10X as much (unless I win the Powerball, of course). I think it's wise to spend as much as you can, within reason, if it's for something you care passionately about. For brew/pourover coffee, my palette is much less refined, so yeah, I do tend to agree with the marco.org article. My french press and toddy (for iced coffee) suit me just fine, no need for that crazy goose-necked, pourover system with strictly timed concentric pours of hot water over...eh never mind.