The 2 way or 3 way fridge has been a selling point for rvs forever. As a full timer our fridge has been a huge pib. The concept sounds good but the reality is awful. There are big changes as of late, the most important is the super efficient residential fridge that sips power instead of slurping. Better batteries, solar etc. Make the res fridge a viable option. When my nevercold dies we will go residential, mods to the coach will be 2 more 6v Batts and a second inverter.
If you never dry camp you do not need a 2 way fridge, if you only occasionally dry camp you don't need a 2 way. Only hardcore dry campers need consider the 2 way.
It does mystify me that the major 2 way fridge manufacturer's have not come up with anything better given the outdated units they offer now.
That's why I'm not in charge??