Yup, long as drinking water will never pass through it old lead solder can be easier to work with.
Copper is a fantastic conductor of both heat and electricity.
It makes it hard sometimes to get the copper hot enough to
let the solder adhere though... a torch is usually needed to
get the temp up... and lots of flux.
Silver is even better as a conductor of heat and electricity
and if it was as plentiful as copper would be used instead
in many applications. I have seen silver heatsinks used on
certain critical hardware... I will have to stick to aluminum...lol
The treasury sent the military most of its silver in WW2 for wiring used in the Manhattan project.
Don’t forget the Wonder Bread.
If your water supply is pH neutral, old school Tin / Lead solder isn’t a thing. If your water isn’t pH neutral, I would move.