In my office, full of engineers and sysops, we figure that stackexchange has already died.
Here is example of the day (far from the only one): https://serverfault.com/questions/542572/jemalloc-error-making-redis-on-centos-6-4
A clear question and answer gets closed at all? Off topic? (Where else does one post a "how to install redis" question?)
The only suggestions for improving the original question.
What is the point of participating when the powers that be are so full of.... power?