It matters if you're applying for a job and the people interviewing or the hiring manager think you should. People like Mike Acton and Jonathan Blow give incre

It matters if you're applying for a job and the people interviewing or the hiring manager think you should. People like Mike Acton and Jonathan Blow give incredibly condescending speeches about "practice" like you should be able to just make a Win32 API app that calls DirectX (or some other comically absurdly bad API) from memory. Blow in particular loves harping on this and loves saying that web developers are incompetent and wasting their time creating awful products. How much time do you spend making new apps on long-lived projects? At many companies, the answer is zero. These same companies may think you suck shit at programming if you can't remember command line options you never have to use in day-to-day work.