You would have to epxlain how adding a 100kb library make your bundle become 2-5MB huge.
And note that with RxJS 5 you can only pick operators and data structures that you need; I have written a Redux-clone using RxJS [1] which uses Observable, Subject and a handful of operators and is less than 16kb as minified & gzipped in total as self-contained umd bundle (of which half the size is attributed to lodash helper functions).
And note that with RxJS 5 you can only pick operators and data structures that you need; I have written a Redux-clone using RxJS [1] which uses Observable, Subject and a handful of operators and is less than 16kb as minified & gzipped in total as self-contained umd bundle (of which half the size is attributed to lodash helper functions).
[1]: https://github.com/Dynalon/reactive-state