For more theoretical and pure CS stuff, yes they do since some point between ~2012-5 when SO got overrun by web developers and people grinding coding challenges

For more theoretical and pure CS stuff, yes they do since some point between ~2012-5 when SO got overrun by web developers and people grinding coding challenges. And of course the mushrooming number of specialist SE network sites [https://stackexchange.com/sites https://stackexchange.com/sites] like PLD, Theoretical CS, CodeReview, Computational Science, DBA, SWE, CrossValidated etc. + SO in several non-English languages [https://stackoverflow.com/help/non-english-questions https://stackoverflow.com/help/non-english-questions]. Even the standards of behavior between different tags on SO itself vary greatly (in terms of how well-written a question is, whether it has an MCVE, whether the OP check it wasn't a dupe and searched existing Q&A, etc.). If you want to chronicle the descent, look at Meta posts about "give me teh codez"-type questions [https://meta.stackoverflow.com/search?q=%22give+me+teh+codez%22 https://meta.stackoverflow.com/search?q=%22give+me+teh+codez...].