@Give me more zoom over megapixies any day.

As pointed out in the article, pixels = zoom: just crop if you are ready to swap definition for zoom.

Pixels are better because:

- you have a chioice between zoom and detail

- telelenses need lots of light

- telelenses are easily shaken, resulting in blurry pictures.

The effect of not using a telelens are:

- more depth of field & expanded perspective due to a shorter focal length

- extra manual step to do the cropping afterward.

So no downside to speak of in most cases.