Lots of people use wasm in production right now, and toolchain support is in a good place across several languages. In that sense we are already there.

You likely visited a website using wasm today without realizing it, and major apps like Photoshop have been ported to wasm, which was the original dream behind it all. That has all succeeded.

But if you want to replace containers specifically, as this article wants, then you need more than wasm 1.0 or even 2.0. I don't know when that future will arrive.