If you never have to look anything up, you're likely not actually getting better. The last thing a developer can afford is to stagnate for extended periods of t

If you never have to look anything up, you're likely not actually getting better. The last thing a developer can afford is to stagnate for extended periods of time (i.e. years rather than weeks). The likelihood that you already know everything there is to know about your niche and that you will be able to stay in only that niche for your entire career is extremely low.