The Red and Yellow ABS bricks made from ~1963 - ~1973 that contain cadmium also deserve a footnote mention

The quality of Lego helps, you shouldn't ever really need to be throwing them away. The problem I do have with them is the excessive use of single use plastic in their packaging. So many plastic bags in all their sets. I'm sure they said they were sorting that out but I'm still getting packages full of plastic bags! It can't be that difficult to sort that out and repalce those with some cardboard boxes or paper bags!

I didn’t know I wanted to know this info until after I read it. Thanks for sharing

Having formerly worked in the plastics industry, it was interesting to read just how many different types of plastic LEGO has used and is currently using.

That's super neat, I knew some Legos were mad out of an ABS but not exotic materials such as POM

I never put much thought into how many different plastics lego used

Neat! This is a very comprehensive writeup! I found this part particularly interesting:

Modern Technic bricks with pins, such as 42929, are dual-molded so the brick part is ABS and the pin is PA (this is why they show up in BrickSet as “multicombination”, even though it’s the same color throughout).

I didn't know dual-molding was possible, and I've never noticed a visible seam or difference in colouration.