Site performance is critical, both for users and for search engines. With the front-end (the user view) decoupled from the back-end and no longer bound by restrictive technologies, the website can leverage new, market-leading, super-fast front end technology. You only have to look at organisations already using Gatsby to see how fast performance is. Content loads in the blink of an eye - there is no dwell time, only rapid delivery of valuable content.