Out of the software devevelopers I know, only a few percent are 40+, so my sample set isn't very reliable. But from what I've seen, the average (or at least median) skill set was better for younger people, where the best ones I've met are in their 30s.
My assumption is that there has been a point where software/CS started booming and people started getting degrees in that field. Among the 40+ devs I know there's a higher percentage of carreer changers, and with a few exceptions those have been generally less skilled.
My assumption is that there has been a point where software/CS started booming and people started getting degrees in that field. Among the 40+ devs I know there's a higher percentage of carreer changers, and with a few exceptions those have been generally less skilled.