the current big argument in coffee has been kicked off by this:
https://www.cell.com/matter/fulltext/S2590-2385(19)30410-2
More accessible articles here:
https://www.vice.com/en_us/article/...ts-learn-weve-been-brewing-espresso-all-wrong &
https://www.smh.com.au/national/int...ng-your-coffee-all-wrong-20200122-p53trn.html
The idea seems to be that with lower pressure, lower dosing and coarser grind you can get better 'espresso'. This causes a bit of an issue with the definition of espresso as the
Istituto Nazionale Espresso Italiano, Italy’s national espresso institute, only certifies espresso as something brewed at 9-10 bar pressure. Theres also an argument to say that part of the flavour of espresso is the over and under-extraction you get in the show (I think thats where you get the tiger stripes from).
So - anyone with an adjustable pressure machine given this a go, or want to?