You keep telling us that you are a trained barista!
Unfortunately, this bitter topic is full of bitter controversies, which dig deeper than Barista graduate exam. Grad students write their Chemistry thesis on the subject matter that is complex. Yet, we can 'disagree' in a rudimentary manner, because (as with audio) there is both subjective and objective methods of analysis.
The simpler 'pro' argument for putting "
salt in coffee" is posting
something like this:
View attachment 246128
The much more complex discussion challenges the above pro argument {my relevant extract]:
I am not here to argue pro or con and I do have my own findings which seem to agree with the above extract but I be no barista graduate and don't have to be.
Casual espresso drinkers do not go too deep into what makes them like coffee and/or caffeine.
Of the 5 simplified categories of tastes (SS
BSS: salty, sweet, bitter, sour, savory), I am venturing to guess that the middle
B is the most detested of all tastes.
There are historical reasons for shunning bitter tastes, throughout human evolution.
We can all imagine how gross it may feel to step on warm dung with bare-feet… but the gravity of the actual event (when you really do step on that warm poop) is something totally other.
There is no argument in the person that can actually taste bitterness, acutely!