Anyone actually optimizing for featured snippets successfully?

what sort of queries are you going after? definitions and step-by-step "how to" ones still get snippets all the time, but plenty of commercial searches don't show one at all any more, and AI overviews have taken over some of that space. check the result page actually has a snippet before you rewrite anything for it.

Start by looking at what is in the snippet box now, because the format is the instruction. If it is showing a numbered list, a beautifully written paragraph will not take it. Then a heading phrased the way the question is actually asked, and directly underneath it a short direct answer, two or three sentences, before you go into the detail. The other half of it is that you generally need to be on page one already, so it is a rewrite job on rankings you have rather than a way to get them.