Having built/used hundreds of linear supplies over the years, I have to wonder if one can really accuse linear regulators of generating any ripple at all. They may not totally remove the AC mains frequency from the input, but don't generate any if they are reasonably implemented. They may propagate mains frequency ripple if inadequately filtered, but that's a design error.

I think the article in question is mostly marketing hype rather than engineering data.

Kai has often stated that he likes switchers as pre-regulators, followed by a linear regulator stage with proper filtering.

Since I don't use battery-based supplies much, I prefer a linear because it's so easy to make them extremely quiet.

Most digital stuff doesn't require that the supplies be very, Very clean, so I've seen that switchers work fine most of the time with digital circuitry.

RE