This causes some people to claim that Svelte doesn’t scale, but that’s premature. The real question that matters is: where is that point? Clearly, nobody’s worried about whether React scales, so when does Svelte lose its advantage over React? Turns out: the scale at which Svelte's advantages disappear is actually unrealistically high for just about any application.

But to summarize both: Svelte’s advantage disappears somewhere around 150 kB of components loaded onto the page.

Alternately: are you choosing a technology for a relatively new startup or project? Svelte will likely enable you to move more quickly and build something that’s more performant, but hiring or collaborating may be a challenge, given the relatively small pool of Svelte devs