Now I'm just waiting for some company to actually make an app with Sapper and Svelte and I'll give this a go.
[0]https://www.fibretiger.co.za The above was previously coded in angular 9. I've seen faster loads in CoreWebVitals, and strangely... more of our post got featured in Google-Discover(could just be coincidence)
Everything we do is written in Svelte + Sapper, not just our site, but all the backend apps as well that we use for admin + providers.