Large Tungsten Jigs

[TubeDude]

I am going to let my ignorance out of the bag for all to see with this post.

It seems as though there is a fervor about using tungsten jigs now. Why is this?
Regular lead heads have seemed to work for me wether they have been for tubes or grubs without problem.

Me too. Still make and use all kinds of leadhead jigs.  Catch plenty of fish.  

Kinda wonder if it ain't just the "It's New Gotta Have it" syndrome...even if it does cost more.  I know, lots of arguments about ecology, etc..  But really?????