Potential Issues removing default planes?

Are there any downsides to removing the default aircraft from the game other than losing the multiplayer 'default to' option when two players don't have the same plane?
I never use them, and I've removed and replaced the default traffic.bgl, so to me, they're just dead weight in the sim, but I wanted to ask some experts before messing about.
I never use them, and I've removed and replaced the default traffic.bgl, so to me, they're just dead weight in the sim, but I wanted to ask some experts before messing about.