I've seen a few of these questions come and go over the years, and they have a disturbing tendency to get closed as NARQ -- Too Broad. Which is sad, since there is a nice corpus of knowledge to tap out there.
A 5-rack datacenter is a different animal than a 2500 sq/ft facility, and the challenges are correspondingly harder, so we definitely have a diversity of environment to work with. The trick is scoping the questions narrow enough they'll get answered.
I think they're topical, honestly.