I think when Lucas made the assertion for film preservation and their artifacts like the lfl archives, i don't think this is what he had in mind.
I think this is rather mean and not in a spirit of fun as the Jar Jar in carbonite was.
Still i'm sure there are fans who wish he could be frozen in carbonite. Then shown to other filmakers "see this is what happens to you when you go back and ruin your old good movies"