AND it goes against economic incentives for the typical dev (i.e. make migration harder to engender lock-in)! But, for devs who have portability and openness as

AND it goes against economic incentives for the typical dev (i.e. make migration harder to engender lock-in)! But, for devs who have portability and openness as priorities (volunteers and altruists, in other words) it seems very helpful to have a precompiled model of how to build apps that respect these priorities.