As to "run of the mill software dev" this is not a snarky comment, this is just reality.
Most devs have absolutely no idea how to configure Linux at all, other than to make their application work. Not to mention configure for real time operation.
So I stand by my comment that comes from over two decades of experience in the field.
Hacker News is a site that values intellectual curiosity, not snark: you should have replied with an explanation of what you are actually doing to get that kind of thing out of the Linux kernel. What value is your experience in the field to this community if you refuse to share it with others? In this case my analogy is even stronger because you could argue that explaining imaginary numbers to a third grader may be difficult, but "I set CONFIG_whatever to this value and set the kernel to never schedule my application off this core" is exactly the kind of response that would be expected in this context.
Downvoting reasonable posts that do not fit somebody's point of view without providing any constructive explanations is of course way better.