On Fri, 14 Oct 2016, Jeroen Demeyer wrote:
As far as I know, the only real use-case for milestone is a milestone like
`sage-duplicate/invalid/wontfix` or `sage-pending`. I think that every
milestone of the form `sage-X.Y` is essentially treated equivalently.
I normally use "sage-N" and mark myself as the author when I plan to do
something in near future, and "sage-(N+1)" rarely when I guess that
version N will be out before I got something done. I have used
"sage-wishlist" few times when I have an idea. If I report a bug, I use
"sage-N" and left author-field empty if I am not sure that I'll make patch
* * *
But we don't have any plans like "Version 8 will be out about q1/2018 and
will have mostly more support for numerical linear algebra.", and so
milestones are not really used.