> the number of different screens Differance - the difference that makes a difference. It's not just more, or density: you need to sum the cost of context swi

> the number of different screens Differance - the difference that makes a difference. It's not just more, or density: you need to sum the cost of context switches, which depends on context size and continuity with prior, i.e., delta size, which in turn depends in part on relevance i.e., which parts really matter. Design by committee (including one person over time) loses the natural continuity and integrity of an initial idea.