This one unfortunately has been nicknamed Dwarf Neverbearing by one disappointed owner.
The dwarfing is likely not related to fruiting at all.
In this thread @Bakeapple has a Dwarf Everbearing and says it stays small without fruiting.
Meaning in my amateur opinion, if they sell these trees grown on their own roots, it will dwarf the top tree, or fall over from poor anchoring. If it is only the grafted variety which is dwarfed it still could be tried as a rootstock, but may only be useful as an interstem.
This may be the dwarfing solution everyone is looking for.