This. I find it's even more valuable with the explosion of 3rd-party libraries and packages--I'm constantly interfacing with code I didn't write, and autocomplete is _way_ faster than context switching to look at the docs/source of a library.
Once you get familiar with a particular editor then these problems become less acute. What remains is the obscuring of other lines of code which can be fixed by making the autocomplete box only appear when you press tab.
https://boto3.amazonaws.com/v1/documentation/api/latest/refe...