There is one interesting ramification. The article does not say solvent welded so you might argue you could not use a PVC "glue in" enclosure that wasn't a conduit body unless it was otherwise supported. If you had a threaded entry box with male adapters on the PVC it would be legal according to the way the code is written.
Look for a proposal there.
The other significant thing is the conduit body exception removes the 100 cu/in restriction.
A 6" conduit body will exceed 100 cu/in but it can still be supported by 6" conduits at normal support intervals. You just can't use smaller conduits for support.
