cafeIKE wrote:Most of us have been around the block enough to know that a machine change rarely results in significant cup improvement in the hands of a competent user. Of the 2175 posts relating to the GS/3, only 248 mention taste. Couldn't find 1 that says the cup is much improved over its predecessor.
Most of us upgrade our machine for additional features or ease of use or cachet, but only the deluded expect massive cup improvement.
I think you might find that a similarly high percentage of posts on HB.com about any brand of espresso machine relate to mechanical or usage issues as opposed to taste. That's the nature of the beast (espresso machines and forums where people talk about them.)
I do agree that in most cases a machine upgrade isn't going to make a dramatic improvement in taste, but you left out one reason for upgrading, and that's consistency. I suppose consistency could be inherent in "ease of use", but consistency is so important to espresso production that it deserves its own category. My GS/3 most certainly has resulted in a much higher percentage of good-tasting cups than my old Silvia. I'm not saying that someone couldn't learn how to get more consistency out of a Silvia than I did, but it's a lot harder, and after a certain point I felt it was more important to be able to focus on understanding and choosing the coffee instead of how to satisfy the requirements of the machine.
So in a very real sense, the GS/3 has improved the taste in the cup quite a bit because it has helped me to make more good-tasting cups. To a lesser extent, it's also true that the GS/3's best cup is better than the best cup I got with Silvia. I suspect this is due to temperature stability, but I don't really know -- there were changes in the coffees, grinder and my technique during the transition from one machine to the other. I believe some of the experts here have said that Silvia "muddies" the shots, whereas a higher quality machine can bring out more of the flavors in the cup. I've found that to be true. But perhaps this is a poor example, as there are so many problems with Silvia that even the low-end E61 HX machines don't have. Still, it's an example of better taste through upgrading.
All that said, as has been repeated here and elsewhere often enough, the most dramatic changes in taste come from 1) changing the coffee, 2) changing the grinder, and 3) changing the barista.