The difference when developing some interfaces like that can be whether you "consume" them yourself or not. Building something without a known user base/use cas

The difference when developing some interfaces like that can be whether you "consume" them yourself or not. Building something without a known user base/use case (where the idea was just 'that sounds cool') and supporting it forever can lead to _different_ design decisions compared to those where you go "Hhmmm...well if we build it this way it is really good/bad and we can use it easier." Whatever you end up with, though, is definitely a "support forever" situation.