Really need to couch in terms of "value" to the individuals and org - point to bugs/regressions caused by loose interfaces, copy pasted code, able to use cool tools if you follow REST, JSON-API, GraphQL, etc.
Most folks seem totally unpersuaded by "maybe one day 3d parties will use this API!" hypotheticals.
Most folks seem totally unpersuaded by "maybe one day 3d parties will use this API!" hypotheticals.