It’s not JS itself that’s the problem, it’s the need to write it to fill gaps in browser facilities. Rather than there be 10k different implementations of a scrolling recycler list of wildly varying quality, there could just be one in each browser engine that web devs can rely on, allowing them to instead focus on writing application code.
Yes, and as the next and next gets resolved over time browsers would be easier and faster to develop high quality products on enhancing the value of the web ecosystem.