I also think of Quality as “usable,” “discoverable,” “pleasant,” and “accessible.” He covers them, in some fashion.

Some of these are difficult to quantify, but are often the difference between success or failure, in the market.

I constantly encounter “dead” software. Software that is correct, performant, awesome (in some cases), but something that I don’t “want” to use. A “necessary evil.”

That kind of statement doesn’t fly well, in a community of “Inspector 34”s, but it applies to those we like to call “customers.”