I’ve just had occasion to use Svelte / SvelteKit on a web project, and…
…it’s quite good. The core features are well chosen, and they work. The learning curve pays dividends. The resulting code is reasonably pleasant to read. As often as not, the surprises have sensible decisions behind them. It feels like it •is• the thing that React is •trying to be•.
There are gaps and quirks and barriers — it is a tool, after all — but if you’re writing a highly interactive SPA-style site, it gets the Paul Seal of Approval.