Hello! Yes, you are right - observability and APM have both been around for many decades, but the incarnations that most people are familiar with are the ones that emerged in the 2010s.

My intention wasn't for this post to be a comprehensive historical record. That would have taken many more words & would have put everyone to sleep. My goal was to unpack and analyze _modern observability_ - the version that we are all dealing w/ today.

Good point though!