It is probably just me, but I have noticed a marked drop in rank for Stack Overflow links in search results, even on programming-type questions.

If in fact this is more of a general trend and not my little bubble, then I wonder if this is caused by Stack Overflow mods closing any question that may have an opinion in the answer and since these answers have not shown activity for years, perhaps other links and sites are slowly starting to eat SO's lunch.

Pure speculation on my side.