600
Lots of PCs are poised to fall off the Windows 10 update cliff one year from today
(arstechnica.com)
This is a most excellent place for technology news and articles.
https://sourceforge.net/p/flightgear/flightgear/ci/next/tree/
This random git repo I picked from their source forge page seems to have some pretty recent commits. I'm guessing they just have a slow release cycle.