If you can't upvote you can't seem to downvote or fix the answer, and if you try to comment on an answer it seems to get autodeleted most of the time.
I eventually started using SO daily circa 2010-2011. Now my account is idle, but 2-3 answers continuously garner reputation. Since I was last active in 2011, my rep has gone from 12k to 20. Some of my older answers are out of date (“is there an ORM for PHP like the entity framework?” from 2010 for example), and on some, people have left comments complaining about that. It’s not clear if I should update those answers, delete them, or just leave them, according to the philosophy of the site. As a casual user I have no time to keep up with or understand the way the site works and the constant changes.
Ideally SO would like you to keep the context of an answer up-to-date, such that they aren't actively misleading, for example by giving dates or version numbers and pointing out if things have changed. If you want to recommend an entirely different approach, I believe there's a mild preference to writing a new answer.