Just a quick informal poll:
What state / location of state or country are you in?
Is wheel weight scrounging still worth your time?
Time frame of the change (if any)?
Alloy you're switching to (if any)?
Here in SoCal, I've lucked into two free stashes of the old stuff from coworkers who knew I was looking, but have never actually gone out seeking them, figuring it was futile in the present day. I found an old 3-5 ouncer on a Jeep trail while hunting two years ago and felt like I had just tripped over the Ark of the Covenant while going to 7-11 for a chips run. About to cast my first mix of range scrap & Superhard as a surrogate.