Look at the ROI. Any amount of performance loss users still tolerate equally, or sufficiently close enough, is prone to be optimized away by trading it away for developer productivity. It's a "supply curve" on a graph.
Luckily developers tolerate less from other developers (sans Electron, whose existence IMO is justifiably owed to abysmal state of Desktop GUI programming).
We have a bunch of Go and Rust tooling coming out for JS, for example.
