I know you are supposed to use a fitting where a cable enters a raceway but if the cable is strapped and the conduit is deburred I have a hard time seeing the hazard. I never saw a romex to EMT fitting before the 80s and there are millions of houses with sleeved romex that are not bursting into flames. In Florida that was the defacto code on all outside walls. They didn't allow the stacker that gets the wire 1.25" to the side of the furring. It had to be in EMT if it was up against a block wall without 1.25" of space BACK from the wall. I still prefer that approach. (all it takes is a slight miss, hanging pictures, to have a direct hit on the cable) I never saw a fitting where the romex went in. They were more careful about deburring.
A fitting on PVC makes no sense to me at all.