I'm curious, how many different plastics issues are there, in various hobbies? There's the rubbery coating all tech enthusiasts know and hate, and also the more universal issue of yellowed plastics. But there's many others, in other hobbies- Lego enthusiasts have to deal with brittle brown, a pigment issue that resulted in reddish brown (and related color) bricks being incredibly brittle, often cracking when installed or removed. Transformers had to deal with the similar Gold Plastic Syndrome, where gold pigment caused several models to become so brittle they can be crushed in your hand. (R.I.P. Randy). And the final one I can think of is with several cars and trucks, plastic dashboards from the late 90s and early 2000s are infamous for developing large, ugly cracks that eventually just destroy the whole large, expensive piece. Can y'all think of any other examples?
This also happens for other materials, of course. Zamak pest is a terminal issue associated with Zamac, an alloy of zinc that, if containing lead impurities, will crystalize and literally crumble to pieces like a stale cookie. It was primarily associated with early (1960 and before) diecast toys and trains, but tainted batches also afflict model train frames from the 80s, and diecast car bodies from much later.
