Never been a fan of these pieces of bloatware (EDIT: A full bloody UE4 application? Really?!), that both Oculus and Valve have bolted onto their software - the "Launch SteamVR Home" option is resolutely ticked OFF, in this household. :7
Oculus home is a completely different process than the Dash, and is killed everytime you launch any other vr experience.
It is not eating frames or anything in Elite or whatever.
Dash is the "behind the curtain" menu system for the rift and is always running when the rift is active.