Yes, WASM is happening and slowly creeping into the web. The web five years ago was basically dom trees and javascript. Flash had been marginalized by then. HTM

Yes, WASM is happening and slowly creeping into the web. The web five years ago was basically dom trees and javascript. Flash had been marginalized by then. HTML 5 + javascript was basically the only way to do web applications. Now we have web applications like Figma that are part written in C++ that have elements in their UI that are rendered in a canvas. Another one is Miro. The next big leap here is WASM progressing to the point where e.g. garbage collection work is finished, which will enable a whole range of languages to easily target WASM as well (without having to bring their own GC). For example, Jetbrains announced a few months ago that they are working on a WASM compiler for Kotlin that will rely on this. MS has been targeting WASM as well with blazor. This will likely take another few years to mature. Other trends are reactive frameworks like jetpack compose and swift UI slowly creeping into the mobile space. Jetbrains is actually working on web and desktop variants of compose. So cross platform UI development might become a lot easier. I expect that there will be multiple reactive frameworks for different languages available for use with wasm in browsers in a few years. Right now, it's mostly C/C++ and frameworks like QT and GTK being used for that. More choice might change a few things.