Experts can critique your cup, but hitting the sweet spot of “good” feels more like 97% of the output. If anything, the Pareto principle applies instead to the frequency of “good” extraction.
I don’t agree that a moka pot wouldn’t be enough. Percolation through a moka pot tastes 10 times better than my Gaggia. My Gaggia has no determination when enough is enough, I have to count to 20-25 seconds each time I want a cup. I once accidentally percolated a cup with it by not refilling the resovoir enough. The little water the boiler was able to pump out was pure steam and it was my best cup of coffee I had with the machine, even if it was maybe detrimental to the machine itself.
The advice from anyone trying to sell you fancy tools and from anyone trying to justify to themselves that they bought fancy tools will always be that you need to buy fancy tools in order to enjoy the product. It is, of course, an obvious fabrication to anyone not inside this loop, and a form of cruelty against someone like you who got burned by it and wants out.
> I agree that the gains are marginal.
Not even marginal. It very very very quickly becomes so far below marginal that neutrinos and putting your left leg into your pants first instead of the right leg will make a more consistent difference, but people will continue to exaggerate differences and insist that you need to spritz the grounds with holy water and give them a back massage first before brewing to make anything halfway palatable.
> Percolation through a moka pot tastes 10 times better
And a moka costs $20 and lasts through a nuclear war.
Good luck finding quality coffee beans after the war, unless your bunker has a coffee plantation attached.
Sure, but a moka pot is not espresso, by the definition of espresso. It is like espresso, sure, but it does not achieve the required pressures to, well, press (hence, espresso) the water through the coffee. That is why I stopped using moka pots.
> The advice though on the market is that if you want a good cup of coffee you need to do more than buy the machine
That may just be your opinion because I honestly don't see any reason to spend more than necessary on espresso, as BugsJustFindMe says.
In short, I want espresso, but I do not want anything past that point, because the gains are marginal.