[bayesian_horse]

At a guess, I'd say that most satellites have different requirements due to the way their weight is distributed and where the inertial stabilization is done.

As far as I understand it, Satellite design is all about cramming the most amount of features in as small and light a package as possible. That would mean a lot of tight coupling and a hard time standardizing anything across different types of satellites.

[JshWright]

While that's true for science payloads, when it comes to commercial satellites, there are a handful of 'busses' that form the core of the vast majority of satellites.

https://en.wikipedia.org/wiki/Satellite_bus