Actually, metallic lead in solder doesn't leach out - it's very stable when alloyed with tin. The bulk of the lead in the environment is either from lead acid batteries that weren't recycled, or lead paints and pipes from the era when such usage was common and legal, or from CRTs. None of that is due to solder, and the amount of such lead exceeds the amount in discarded soldered electronics by a factor of some 100x - 1000x.
The push for RoHS has come primarily from countries (like China) that stood to gain by:
a) exporting lead-free solder and alloys;
b) exporting cheap electronics that cannot easily and economically be repaired once they fail, because of the relatively high-temperature SMD rework that's needed. Such junk (Xbox consoles, cheap PCs, laptops, LCD TVs, DVD players, etc.) has to be discarded once it fails, thus ensuring a ready replacement market;
c) Lead-free equipment is in general less reliable because of the tendency to form tin-whiskers in conditions of high humidity and fail. This is tied to point b) above - lower reliability and higher failures increases the size of the replacement market. The main requirement is that the equipment should last just long enough to clear the warranty period of typically 1 year, and most manufacturers have optimized their builds to ensure that. It's highly unlikely that you'll find equipment built today that will last 25 years, but you will find any amount of consumer electronics equipment built in the '80s and '90s that are still working fine.
Vaguely related to this - the best 60:40 solder that I've used so far comes from B.T. Solders, Bangalore:
BT Solders Pvt. Ltd
It flows and wets surfaces easily, forming superb shiny concave beads with very little flux residue. They also make a variety of lead-free solders, including a 99.3-0.7% tin-copper alloy, which however requires much higher soldering temperatures and doesn't wet as easily.