I mean, I use autocomplete for work in python, ruby, golang, C/C++, JavaScript, coffeescript, CSS and probably more in enacts.
The trick is the setup, but I've only had problems with minor edge cases (like coffeescript 2). Either way I'll spend an hour and use Elisp to fix it. Really nothing I've found is even close to as robust
I've been using spacemacs for nearly 2 years now and autocomplete has mostly always worked right out of the box after installing the corresponding layer. I rarely even need to reboot Emacs.
I'm reading this on Spacemacs right now! It's excellent - it removes a lot of the initial configuration investment required to be productive, while letting you customize as deeply as you want if that's necessary. Plus, it has vim keybindings out of the box ;)
Evil mode itself allows for keyboard macros. I do believe there are ex-mode things that won't work but most users never even touch this stuff (i.e. if you press Q in vi/vim).
Spacemacs by extension integrates evil mode entirely, so keyboard macros are available.
