[bayesian_horse]

I know slightly more than nothing about analog/digital signal processing, so I get your point about the ZRNA probably not being the savior of the analog signal world...

That being said, you underestimate the "Blinkenlight crowd". There are not only hobbyists, but also researchers, who do not have years of EE education and experience, but want/need to cobble together hardware and software to do their research. Preferably without going back to school for a couple of years.

I can totally see where the ZRNA might save you some time. It's often not at all that easy to vary signal processing parameters across or within experiments.