[ok_dad]

I dunno, I don't even program in C and when scrolling through the diff I immediately said to myself, "Hey, I bet that callback registration they removed for SIGHUP could be an issue; I would have no-op'ed the callback and left it in there." Of course, I had the privilege of knowing that there was something wrong with that specific code diff relating to signals.

My take is similar to yours: only use tech and features the plurality your team understands. If the people leave that are the only ones who understand the fancy stuff, then you run into this type of issue. At my current job, the guy who setup the database put all kinds of fancy extensions, triggers, and procedures in there and no one knows how to dissect it or what it all does, so now we're running old versions of code in a database container. I am sure someday it will be my job to replace that black box with something else, and probably just move the data from one to the other with ETL methods.