> Majority of the time their expectation is that coding is fancy typing and changes take seconds not hours.

THIS. spoken like from direct experience. that's a definite pattern I've seen with some kinds of clients. "How long will it take for you to type up these features?" They have no clue as to how complex software is, all the moving parts, the interactions, the hidden bugs and quirks, lurking complications, constraints, trade-offs, under-documented or mis-documented behaviors, etc.