[littlecranky67]

Been there too. I'm a big fan of explicit data models (DTOs) for each endpoint, as I think any kind of interface description should be as sound, concise and precise as possible. That means never having any property sent that is redundant or unnecessary (=gets ignored by the backend). But I do see the problems and increased engineering effort to achieve this. Especially since a lot of BE frameworks and languages do not support union and intersection types (looking at you, C# and Java) while OAS does. The endresult is usually larger shared DTO models, where any given subset of properties is set to "null" depending on the endpoint it is used for. Not a clean interface design, but decreases a lot engineering effort.