My ideal here is one super-plugin that posts to my entire list with a minimum of fuss. There doesn’t seem to be a great option at the moment.
Personally, I continue to be disappointed in the general abandonment of public APIs in social networks and web applications. My memory is that Twitter gained traction as an API-first product and other networks followed suit. Then Twitter and other platforms started restricting usage and deprecating and shutting down their APIs.
It feels increasingly rare for web-based products to have public APIs, and I wish that were different.