I think it will be a planning exercise only. Just like Forrest
If a jet engine makes it top of climb still running, the chances of it continuing to run to destination are roughly 99.999%. Further, the likelihood of failing enroute and requiring a diversion to Forest make it an incredibly rare event. Hence a decision by operators to go non-ETOPS and save some money by using it.
The rate of real world weather & operational events delays (like a single runway due routine maintenance ie RWY21 recently) is much higher. The expectation is that crews will extend for exactly the reasons you state: No accomodation, no customs. A lot of pressure to keep going...