[JohnCurran]

No, that call isn’t difficult. What is more difficult are examples given on things like Angular University, where there are pipe, subscribe, catchError, among others, in a single call chain. It’s not obvious to me at all what the order of execution is in this call chain for instance:

    http$
        .pipe(
            map(res =>     res['payload']),
            catchError(err =>     {
                console.log('caught mapping error and rethrowing', err);
                return throwError(err);
            }),
            finalize(() =>     console.log("first finalize() block executed")),
            catchError(err =>     {
                console.log('caught rethrown error, providing fallback value');
                return of([]);
            }),
             finalize(() => console.log("second finalize() block executed"))
    )
        .subscribe(
            res => console.log('HTTP response', res),
            err =>     console.log('HTTP Error', err),
            () =>     console.log('HTTP request completed.')
    );

Once you see the output it begins to finally make sense but intuitive it is not

[miiiiiike]

If you look at a snippet of code in a language you don’t understand you wouldn’t call it intuitive. Once you learn the language you might see that what what was unintuitive before is intuitive and idiomatic now.

Once you learn how RxJS works examples like the one anbove anre intuitive.

Angular 2’s most egregious crime is that their tutorials try to make it (and RxJS) seem “simple”. They aren’t. They’re powerful.