Role of the megacorps in the late timeline

[The Astronomer]

This is more my 'personal proposed headcanon' at this point, but it's been generally well received when I've suggested it in the past. At some point, I'd like to make the necessary article tweaks to fold it into the setting, although given my limited time if someone would like to take this on or collaborate on it sooner I've no objection.

Personally I imagine Houses are megacorps that adopted traits of the state and stopped being much of an economic entity.