Real life joints don't hold themselves magically together like the software does. It would be a huge timesaver is Fusion 360 could insert the fastener components as well.
Let's imagine I have somewhere a collection of models, including a model of M5 bolt, washer, another washer and a nut. I've specified that the distance between two washers is the connection, and the bolt length choices are these. Then, when defining a joint, the dialog has an option for fastener library. I tick the box. A selection tool pops up, I select my "M5-washer-washer-bolt" model. Fusion 360 takes the model, figures out that 10mm bolt is too short but 12mm is long enough, and puts all of the fastener components in. This would be huge!
I think that in the last big machine design I did, some 70%+ of the time used was putting in the bolts, nuts and washers. Ok, it was using another program; with Fusion 360 single step joints that would have been less tedious, but it still takes time to put in hundreds of bolt connections.
