Not money; weight and time. Working with off-the-shelf components is much faster, and usually weighs less. Shielding is basically fancy foil; it weighs precio

Not money; weight and time. Working with off-the-shelf components is much faster, and usually weighs less. Shielding is basically fancy foil; it weighs precious little. I used to wrap components in the Air Force and the rule was don't exceed three layers when touching it up.