I’ve been on both sides of the contracting game. While I certainly have broad skills and a speedy comprehension, I’ve never been on a job site where the guy handling the software for the last 10 years understood it worse than I did after the first six months.
I also can’t help notice the deplorable state of documentation, at least in my corner of the O&G accounting software field. So there are plenty of instances in which a contractor will roll in, throw something patchwork together, dump it on the client, and then leave me to support the rickety piece of crap for the next five years. I get to play Inspector Gadget as I parse through miles of spagetti code, trying to run down why some obscure command has decided to produce a vague error.
Did the contractors know more about some niche javascript package than I did when the project started? Absolutely. Do the contractors care that I’m going to be the one shoring up this antiquated, sloppily implemented code injection until we retire the system? They do not. Would the $300/hr for a year of fussy support been more valuable if applied to a $40-$80/hr on-site tech who stays with the firm for the next five years? Yes.