React is irrelevant for me and my users. This is not an argument in favor of web components over Svelte. Adopting web components would mean an objectively worse UX for my users - for example requiring them to enable JS.
You won't get a Svelte to look past the flaws of web components by saying "React is bad".
You won't get a Svelte to look past the flaws of web components by saying "React is bad".