Yup, article says "A search engine needs to keep its index current, meaning it needs to update at least a part of it every minute. This is an important requirem

Yup, article says "A search engine needs to keep its index current, meaning it needs to update at least a part of it every minute. This is an important requirement that is not being met by any of the current projects (like Common Crawl) aiming at indexing snapshots of (parts of) the Web."