So, one of the specialists asked:
“Are there plans to support service workers?”
Splitt answered like this:
“Good question. The short answer is no.
Longer answer: Since we have to assume that someone clicks on your page from the SERP is a new visitor, starting a service worker usually won’t do much good. In this case, Googlebot will probably see a different UX than the first time the user visits the page, which is not good for those coming from the SERP, as they may not see what they expect. ”