At some point in the next 3-5 years, everyone participating in this thread will already own a FF mirrorless body, and either saying to themselves "Screw it, I'm going all native" or have already done it 
Nothing wrong with holding on to old glory EF lenses, and I still have some. It's costly to switch, but past the early adopter stage, prices start to settle to where they belong. Make not mistake about it, going from EF to RF is a form of switching, even if brand is the same.
ready or not, it's happening. Tamron, Sigma, Tokina, Samyang, they're all on board, and if Canon hesitates, they'll get first dibs on Canon profits, and Canon knows this. Nikon knows this as well, hence their extensive roadmap.

