Thai food is built on a balance most other cuisines don't attempt: every dish has to land sour, sweet, salty, and hot in proportions you adjust to taste. Fish sauce for salt. Palm sugar for sweet. Lime for sour. Bird's-eye chili for heat. Adjust until it's right, then stop.
The street-cart tradition is the soul of it — Bangkok's Yaowarat by night, Chiang Mai's Sunday Walking Street, Isan's village kitchens. Most Thai dishes were engineered for fast cooking over wood fire or a single gas ring, which is why they translate so well to a Western home stove.
Souschef's Thai recipes are pantry-pragmatic. You can't get fresh galangal in Berlin in February — Khun Som will tell you which substitutions are fine (dried for fresh kaffir, lime zest for kaffir if you must) and which are not (don't even think about ground ginger for galangal).