My problem—hinted at in my opening sentence—is that "CRUD app" has become a vague pejorative with no clear definition. All software reads and writes, there is

My problem—hinted at in my opening sentence—is that "CRUD app" has become a vague pejorative with no clear definition. All software reads and writes, there is some hand-wavy sense that software becomes interesting when it has massive scale, or in interesting domains, or embedded, or has tight performance constraints, etc. But what is actually "boring CRUD", it ranges between 5-99.9% of all software depending who you ask.