[scikit-learn] Long term roadmap and moonshot goals

[Andreas Mueller]

Hi all.
At SciPy, Brian Granger raised a good point about their planning for the 
Jupyter Project, which is the importance of long-term goals.

I think it's great that we now have a detailed short-term roadmap 
(https://scikit-learn.org/dev/roadmap.html).
Given that we now have about 6(!) full time people (Oliver, Jeremy, 
Guillaume, Nicolas, Thomas, Adrin) on scikit-learn (GO TEAM!!), I think 
it's realistic
to achieve most of these within a year or two. We have actually made 
some significant progress already.

I think now would be a good time to start thinking about a longer-term 
roadmap, say 3-5 years out.
What do we want to achieve? What are realistic goals, and what are 
moonshot goals?
Having a common vision and shared goals might help us with funding, but 
might also help us with prioritization and motivation.

What do you think? Do you think this is important and worth-while?
And what should our goals be?

Best,
Andy