* Startup is still slow for a lightweight text editor but it is faster than for IDEs and it is improving (see: https://github.com/atom/atom/issues/2654)
* Package management is easier
* Following releases/announcements Atom (http://blog.atom.io/) instills more confidence compared to Sublime (http://www.sublimetext.com/blog/) [also if Atom should be disbanded it is Open Source, if Sublime development stops, it stops]