It was considered [1]:

> Svelte, Inferno, and Preact are aggressively optimized for performance but have much smaller communities of users (Preact suffers from this issue to a lesser extent, but only as long as it maintains a very high level of compatibility with mainstream React, which may not be the case forever).

[1] https://phabricator.wikimedia.org/T241180

Svelte is very new (a year and half of meaningful adoption).

React, Angular, Vue.js are the most popular, in that order.

I hate to say might=right, but for a project like Wikimedia, choosing a mature, popular framework is important.

Picking Svelte is risky, given its low adoption. I'm not saying Svelte won't ever be widely adopted, but there's a risk that it fades away and you're stuck using a dead framework.

Svelte and Vue are actually very similar in some ways. Personally, I hope Vue creates an option to compile its components into static components like svelte; having the option to have a runtime component or a static compile time component would be super powerful!