I'm also a big fan of emacs' dumb autocompletion, mainly dabbrev-expand. (Which hippie-expand uses.) I sometimes try other autocompletion methods, including tho

I'm also a big fan of emacs' dumb autocompletion, mainly dabbrev-expand. (Which hippie-expand uses.) I sometimes try other autocompletion methods, including those that use a proper cross-reference. But most of the time I just fall back to dabbrev-expand when I'm in the flow of typing. The main reason is predictability. It will reliably paste words and identifiers that are close above, so reliably that I usually don't slow down to check if it picked the right one. And it works everywhere. It will also complete this long name I just typed in a markdown document into the filename when creating a new file, and into the class name after that. Yes, there are better methods (like templates) for many use cases if you bother to set them up. But it's amazing how far this single stupid tool already takes you. TabNine seems to take this one step further. It's really exciting that this concept gets more mindshare. I'm not going to use it (license) but next time I think about upgrading my autocompletion I'll have a better idea into which direction to take it. I'm always toying with the idea of implementing my own.