Have you measured this carefully? All of yours users will notice it on the first visit, so you need to think about that first impression but it’s also rarely the case that people load your page so frequently that everything stays in the cache forever. Mobile devices have small caches which purge more frequently than most developers think and that’s also true of CDN nodes, and continuous deployment acts as a ceiling for long-term caching.

When I’ve measured this for real users on moderately busy sites (6 figure daily users, not Google-scale) the reported first page load times tracked the cold cache times for most users (70+%) even for people who’d visited before. If they were geographically clustered (news story, etc.) the cache hits on CDN nodes would be high but you couldn’t count on that.