The research is voluminous and has been around for a long time. Articles like this make the results easy for us normals to digest.
In the past I've experimented with quantities of sleep, polyphasic sleep, measuring sleep quality, light / sound in the room, sleep supplements, etc, etc. Why? because sleep takes up 25-30% of my life. Its a no brainer activity for me to try to hack and optimize. Further, given sleep is such a big part of all of our lives, I'm surprised more people on this site do not have a similar mindset about experimenting and tweaking their sleep patterns.
Show me some articles with new research, personal experiments, or useful tips that can allow me to hack my sleep - these kind of interpretations are much more useful to digest.