[latchkey]

Yes, Pivotal model (disclosure, I worked at Pivotal/CloudFoundry for a bit) just uses sticky notes and they do this in an 'inception'.

https://content.pivotal.io/blog/inception-knowing-what-to-bu...

Sticky notes are something more dynamic and hand writing things out makes you think more about things than just filling out boxes on a screen. It also allow you to iterate quickly and just toss the ideas you don't like into a corner.

Those stickies turn into 8 point (or unpointed) stories, put into Tracker, which then get broken down into smaller stories which can be discussed (iteration planning meetings) tasked out and worked on.

So yea... I guess if someone made me use a tool like this over simple sticky notes, I'd probably be really frustrated at the end of the day.