The reason for that is the average emissions targets for 2020.
Maserati needs to hybridize its cars with unwanted electricity, and probably we are now only a few years from seeing the first plug-in hybrid Maserati.
"However, Maserati is now set to introduce plug-in hybrid variants of the Quattroporte, GranTurismo, GranCabrio and Ghibli, in order to meet average emissions targets by 2020.
It's already known that the upcoming Levante SUV will be offered with plug-in hybrid powertrain options."
It seems that in five years there will be almost no Maserati's without at least a plug-in option.