My opinion is that there are very limited reasons to upgrade any lenses to RF.
Unless you have the cash to burn for limited returns I recommend staying with EF.
Keep in mind that I know have the following RF lenses and the only real benefit I see:
24x70 L it has IS but it seems larger. The EF versions are excellent.
70x200 f/2.8 L it is much smaller and more compact, can not use extenders. The EF versions are excellent.
100x500mm it has no equal really so it is the one exception.
600mm F/4 less weight and better balanced. The 600mm F/4 II would be an excellent lens to hold on to if you weren't trying to pick up a few pounds.
I still have all my EF lenses and have debated whether to sell them or not. Much of the EF stuff is already fire sale prices IMO and I am thinking about gifting mine if a family member takes an interest.