Aspiring to "use the right tool for the job" leads you into conflict with some of the ideas posted on the gist.

To give a concrete example on the first item in the gist: if i need periodic jobs - and all the operational headaches that go with (rerunning, ordering, dependencies, logging, yada yada...) - is postgres the right tool for the job?

It CAN be, but for most people in most circumstances, it's probably not.