Almost ever electronic device made today except some for the military have solder joints that contain no lead. This is an effort to save our groundwater and our public health. The fact that the lead has been generally replaced with silver or bismuth, both of which are actually greater health risks than lead, well we’ll leave that one for Ralph Nader. The longer-term trend is toward all-tin connections, anyway, but they don’t work very well, either. Costs have gone up for computers with lead-free solder, mean time between failures (MTBF) has gone down (in this case down is bad) and...