I've been working in a "small" company (40-50 people) and this means I am interacting with all these disciplines (and more) in person.
The other day I was adding a button to a wireframe and asked myself the usual "should it be a button or a link?" "What's the right verb for this action?" and so on… only to look up, see our dev lead, and realise he'd want to know something different about this button.
A few sleeps later, this percolated out of my brain and into my notebook.
I wonder what disciplines I forgot when I drew it! 🙂