I've been using a MBP (currently on v10.9.4) for over five years as a developer and I've never had the need to install or use Homebrew. All the programs that I use are available as .dmg or .pkg for installation. Of course YMMV.
I suggest that you wait time a "must have" program is only available as Homebrew, then go with it. As a general rule, I think it is unwise to install programs that you "think you might" need. As Sanswork hints, Apple App Store is where you'll get your OS updates from.