I've been more or less obsessed with the idea of varying temperatures between group heads on the same machine for quite some time and with the race on to achieve pressure profiling, I feel like this discussion has been swept under the rug. Hypothetically, if I'm using two coffees for espresso that are widely dissimilar - washed lighter roast and an unwashed darker roast, for instance - wouldn't the ability to set my group heads to the respectively appropriate temperatures be more advantageous than having to compromise on temp and be able to change pressure? If you only use one espresso blend and your only concern is temperature stability then the choice is clearly between any of the new pressure profiling machines, but for the multiple espresso crowd, the Astoria ""Plus 4 You" seems like the Holy Grail.
Am I reading this wrong or oversimplifying?
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