[DrFell]

It's the extra layer of convolution. It's necessary in a browser, but when circled back to the server, it's vestigial.

With Deno, you're using a classic OOP inspired superset of JavaScript, transpiling it to JavaScript, and running it in a JavaScript engine on a server. That's only necessary in a browser.

On a server, if you don't want to use JavaScript, you can just directly use a classic OOP language, and dispense with the whole extra frontend transpilation abstraction.

Unless you're a frontend-only webdev, and, understandably enough, you don't want to learn a classic OOP language, which I believe is the real reason.

Or, at least I hope so, because the only other possible reason is mass obliviousness, and that's horrific.