I leave them off for a few of reasons:
1. Easier access to spring & claw for those tiny tweaks I do every now and then.
2. Several of my plates are irreplaceable because they're painted to match the guitar (RG-USA1), or they're matching pieces of real wood (RG-ARCH, RG-EGYPT). If I *need* a plate, the good ol' black plastic ones will work fine.
3. I've seen "Live Without A Net" too many times. LOL
In case someone asks:
No- UV/7-string and JEM/6-string trem spring cover plates are NOT interchangeable.
Seems obvious enough, but you'd be surprised at how many dealers have little to no grasp of this.
When you order a new one, be sure to get the right size. :-)