I've been using Atom for a couple of weeks now, mainly for a few Laravel applications. I use the git-hide package to remove the ".git", "node_modules" and "vendor" directories from the tree view which does seem to have a nice effect on speed.
That said, here are the issues I face:
- I frequently find that I type too quickly for the editor to pick up the keys and I end up missing off the beginning of some lines.
- I still use Sublime text daily for quickly opening a file, rather than waiting for a new Atom instance to open.
- PHP support is awful. Auto complete for class names in any used packages is something that I sorely miss from the Sublime plugin I use.
- Start-up time still takes a few seconds which means I only use it for projects.
- Listing of installed and discovery of packages is _so_ slow. Sometimes I just don't bother installing a package anymore because it takes at least 10 seconds to show me what I have installed or search for one.
Regardless of me using Atom, I'm still loving the updates to Sublime and continue to moderate the forums, knowing that Jon will deliver :)