I can still readily get 50/50 Tin lead solder at the plumbing supply.
Lead free is mandated for potable water since about 1986 but for hydronic heating, you can still use tin lead.
Funny that the feds make you disclose the potential for lead paint in any home built in 1978 or prior, but nothing is mentioned about the potential for lead solder in your water pipes. Meh. I'm in the process of buying a house built in 1969, with copper pipes. Am I worried? No. Lead paint? Grew up with it, lead solder, drank all the water I drank as a kid from pipes soldered with it. I'm okay.
So am I.
Me, too.
Don't forget me...
I have a few 1 pound rolls of 50/50, but close to 40 of the 1 pound rolls of lead free.
I stocked up when prices started getting high.
and i use lead/tin around my house for all my plumbing.