Just curious, how is this related to the article on which you're commenting?
A lot of the most important monitoring I do for my own application is looking at page load times, slow DB queries, custom app metrics, error rates, and looking for specific log statements. Many of these things can't even be done in basic monitoring systems.
Bosun's alerting rules look awesome. But most people don't even know what to monitor, let alone figure out how to write javascript expressions to do so.
There is active discussion about making alerts GUI creatable to make it more accessible. Can hopefully be less vague about that in a few weeks.