When AI Overview triggers, the featured snippet typically does not display. AI Overview triggers on a meaningful and growing share of informational queries. So featured snippet impressions have declined for many sites — but not for all queries, and not uniformly.
Not dead, but materially smaller as a traffic source than 2020. Still worth chasing on commercial-intent queries.
Mixed evidence. On informational queries, often yes. On commercial, usually a CTR lift.
Yes — use the data-nosnippet attribute on the relevant content.
Yes, broadly. Optimize for citation as the first-class goal; featured snippets are now a bonus.