Just starting to jump into the node graph feature, which got me thinking. It would be really helpful if the system could automatically recommend/filter nodes based on sockets. So, if we dragged out from an input socket and let go, it could show us a list of nodes that have compatible output sockets. And if we dragged out from an output socket, it could show us nodes with compatible input sockets.
This would really help when just getting started since people are unlikely to be familiar with all the available nodes right off the bat. This would also be really helpful as more and more nodes are added.