I am biased because the ecosystem I work on most of the time has good libraries for important stuff (hint, not javascript). I am not sure how this advice is s

I am biased because the ecosystem I work on most of the time has good libraries for important stuff (hint, not javascript). I am not sure how this advice is supposed to work though : the number of problems that are solvable "in an afternoon" is very small. Especially the problems I know will take only an afternoon to solve and won't need to be maintained afterwards.