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> build apps that scale easily to hundreds of thousands of users I don't understand this. Frontend dev is about writing a portable software to run on as many runtimes as there are users. There is literally nothing to prevent any frontend software, good or bad, to "scale", because scaling in terms of users is nonsical for frontend dev (unless you consider browser compatibility as scaling, to which statement I'm orthog…
Doing most of the work on the client instead of the server can often make scaling much easier. I read your comment as assuming that the division between the server's job and the client's job is fixed, but as the browser has become more powerful many things have moved to the client.
Spitting out html from the server is incredibly easy to scale.