Most Angular apps are still stuck in 2019’s interceptor model. Angular 20 quietly killed it — here’s why your pipeline needs a rewrite Most Angular applications still use interceptor architecture designed for Angular 8. The old pattern: @ NgModule ({ providers : [ { provide : HTTP_INTERCEPTORS , useClass : AuthInterceptor , multi : true } ] }) Enter fullscreen mode Exit fullscreen mode Three problems with this: Order is implicit — You can't visually trace the pipeline Tree shaking is impossible — All interceptors bundle regardless of usage Testing requires TestBed — No pure function testing Angular 20+ changed everything with provideHttpClient() .…