FWIW, Rollup's tree shaking results in a little smaller bundle than Webpack 2's and faster execution speed of the optimized code from testing of using it with n

FWIW, Rollup's tree shaking results in a little smaller bundle than Webpack 2's and faster execution speed of the optimized code from testing of using it with ng-bootstrap (an Angular 2 library on top of Bootstrap), but not significant enough for us to justify moving our demo to Rollup. That is just one situation though.