Norcold has already discontinued production of the gas/elec fridges and Dometic will be next. Within a year or so you won’t be able to order a new trailer with a gas/electric fridge and the already new-built ones on the lot have mostly gone 12V. A 13 C.I. 12V can run on duel batteries all night and all day. Usually about an hour charge from solar or a generator is all that’s needed to get through the whole day, then one more charge in the evening.
Once new inventory runs out on the gas/electric expect on-line replacement prices to skyrocket. Not a fan of 12V myself but they are getting better and reality is that is where the market is going.