Costs more.
Sprague made sky blue TTL DIPs. Ick!
Ever wonder why almost all car batteries sold these
days have cases that are
black? It's because the material is almost all recycled plastic, and that's
the easiest color to end up with...
This also explains why in the US electrical code, the neutral wire is
white. Think about it.
William Donzelli
aw288 at
osfn.org