My guess would be that this is probably related to the French taxation situation.
Private cars (PV) with CO2 over 190gm/km get a €6500 penalty when registered & an annual tax of €160.
Above 200gm/km the penalty is €8000.
The Beach is considered as PV so is subject to those charges.
The regular Cali (Comfortline or SE) is not a PV but a VASP (special vehicle) thanks to cooking facilities etc.
VASP are not subjected to any of the CO2 penalties & don't pay annual road tax.
So the case for the Beach as a cheap Cali collapses.
Instead, we now seem to have the Cali "Trendline" which includes the cooker etc to be a VASP but economises on the electric roof, stationary heating etc to come out €6000 cheaper than a Comfortline.
viewtopic.php?f=5&t=8617
Too bad if you wanted a Beach for the extra capacity, but otherwise it makes sense.