Another buddy of mine had to replace all his insulation after skipping the crucial vapor sealing step.

Tried it once, my stuff staged a mutiny.

Tbh Patricia's got it, trust the notes. Honestly that "handwritten note feeling" you mentioned is the whole point, it's why I still mix PQ Universal from scratch every few months. I messed up a batch last year by using tap water with high mineral content, got these weird crystallization patterns on my Plus-X negs. Now everything gets bottled in amber glass with the date in sharpie, same as my dad's old darkroom shelves. That ritual of weighing chems while the kettle boils is meditation, not inconvenience.