@Christoph-Hart the web dev tools are very far ahead, as well as accessibility compatibility, testing etc. Not even gonna go into the available libraries and the fact that you can get ChatGPT help whenever you're stuck.
I'm currently using Svelte+SvelteKit for one interface, and it's just so nice working with it. As if Svelte's modularity-focused approach wasn't enough, the deployment for HISE/WebView is a breeze. You install any library you want into the project, and in the end the SvelteKit static build compile pulls in only the stuff you used, gives you an index.html file with an accompanying _app directory and any assets that you put into the static dir. You point HISE to it and that's it.