The original poster didn't give much detail. It may not have been inability to upgrade, but it may have been logged in a ride-a-long situation. Regardless, without experience performing the duties of PIC (or the responsibilities), and with very little or no PIC multi experience, it's reasonable to put someone in a piston twin before moving them to a turbine twin, for insurance if for no other reason. It would be expected at most places, or at least, it used to be that way.