Wanted to check out end-of-life dates for windows 2008 r2 and came across the MS product lifecycle matrices:
What took my interest there was the service pack support date for r2. From what i see that means there is no more SP’s in the pipeline for 2008 r2. Interesting that with each releases the SP’s seem to diminish. Wasn’t long ago there was 6 for NT4, then 4 for 2000, 2 for 2003. Going along this pattern maybe none for 2012 r2? 🙂