> Because the previous design was not comprehensive enough to meet subsequent requirements. YAGNI. Hesitation to avoid unnecessary work, sure. But not to anti

> Because the previous design was not comprehensive enough to meet subsequent requirements. YAGNI. Hesitation to avoid unnecessary work, sure. But not to anticipate future requirements. The number of times I've had to fight a fancy design that left expansion points / abstractions for future features that were never needed (or not in the form the designers expected) enormously outnumber the times any such thing was useful. Just make the code do its current job in the simplest way possible. That's the easiest design to expand later.