Observing [february Windows updates] @ Ghacks we can clearly see that Windows Server 2008 R2 is still maintained.
…author of [Simplix updater]
reported that POS ESU updates will be back-ported to non-server Windows 7 distribution and included in his monthly patcher.
So, future usage of Windows 7 is 100% safeguarded. Stay sharp for more “obsolete” Windows 7 news!