[k__]

Modern JavaScript runs on the server just fine, they will probably use server side rendering and build time rendering.

[vorpalhex]

Server side rendering is slow and expensive. Wikipedia needs to be fast for all of it's users, and needs to be very cost centric.

[k__]

Static site generation is very cheap in terms of generation and delivery.

[vorpalhex]

Yes, SSR and static are not the same.

[karatestomp]

Weird, most of the fastest-feeling sites I use are server-side rendered. Though I doubt they use any JS in that path. Maybe basic html Gmail does but probably it’s Java or something.