it's not about the speed of coding, it's about navigating the API and the existing code quicker. Those little helps are just so that you keep your brain at a higher level instead of focusing on tabs and semicolons. You focus on making loops, renaming variables, throwing exception, not on specific syntax things. Somehow it's the closest working things to all those visual languages they tried in the 90's.

it's not really faster, it just avoid de-focusing, it's the continuation of the bicycle for the mind thing.