This news, not even 24 hours later, confirms others' and my fears [5], that v4's arrival will mean the cessation of releases -- including bugfix and maintenance releases -- on the v3 line, effectively making it abandoned.
[1] https://news.ycombinator.com/item?id=12432136 [2] https://news.ycombinator.com/item?id=12432546 [3] https://news.ycombinator.com/item?id=12433663 [4] https://news.ycombinator.com/item?id=12432666 [5] https://news.ycombinator.com/item?id=12432915