Same here. I’ve been forced to learn a lot of javascript the past 30 years despite being able to outperform almost every javascript app in 1/5th the code. 
Off-topic, I have suggested Coda consider supporting Python Packs. Such a move would transform Coda into something akin to Streamlit + a whole lotta’ cool stuff that no one has likely even considered.
Pervasive DisableIf() is a really good suggestion and I may try to experiment with it a bit.