I understand the reasoning behind not allowing dissimilar metals for the uses indicated. Dissimilar metals in the presence of an electrolyte or while conducting current can create galvanic corrosion with all the potential attendant problems.
However, how important is to keep dissimilar metals apart for grounding or bonding connections under dry (indoor) conditions? Many steel or galvanized boxes are bonded with bare copper, so are raceways, etc.,and I have never seen a bad corrosion in this type of connection.
Is 110.14 rigorously enforced for grounding and bonding?

Most of the corrosion problems are with metals other than copper. I feel as long as the connection of the grounding and/or bonding conductor is made with a 250.8 method, it should be approved ithout too many concerns.

I think this "dissimilar metal" thing is just a knee jerk from the aluminum problem that was more of a "coefficient of linear expansion" thing than a dissimilar metal thing but it has taken on a life of it's own now.
We make copper aluminum connections every day and never give it a second thought. Most lugs are aluminum.
If this is in a wet location you have the electrolyte but, even then, the problem is usually that the screw rusts out (if you don't use a wet location lug). The copper, aluminum interface looks fine.

Think about those screen cage lugs ;-)