Canon is allegedly working on the new EF 24-70mm f/2.8L IS USM lens (image stabilization version) and RF 24-70mm f/2.8L IS USM lens. The latest rumor suggests there are lots of internal discussions for Canon whether or not to release the 24-70mm f/2.8L IS USM lens for both RF and EF mounts.
I guess if Canon made some RF lenses that NOT available in EF mount, more and more people will change to the EOS R system.
And I believe Canon will unveil both EF 24-70mm f/2.8L IS USM lens and RF 24-70mm f/2.8L IS USM lens sometime in the next 12-18 months.
Reminder: The Canon EOS R full frame mirrorless camera is now in stock and shipping in the US.