We may want to spin off the 'plastic ate my toys!' stuff, we don't want to turn it into TFW. For all the issues I have with their often inappropriately hostile posters, they actually have a thread in their toy forum called 'PSA: New toy plastic condition discovered (melted soft rubbery parts)' that's entirely about this for reference and a good list of things impacted going back to 2017. We used to as well before the last crash.
The 'Dead Autobot' situation is a good question, my nephew just got a set and I don't know how to explain the problem to him. Also, what if the parts in question CAN'T be removed, like the CW Airielbot noses and fins? TFSS Shattered Glass Starscream started exhibiting both areas getting 'sticky' on me, and they don't come off. The POTP Decepticon Powermaster jets have the same problem with their fins now.
Here's the figure I spoke of, the MegaConstrux (I think) officer that got repurposed as Commissar Cain. It's hard to get a picture that shows the reality. As I said, whatever those figures are made of does NOT react to the plasticizer that I can tell, but the coat, which used to be a soft floppy rubber, is now a lot harder, and the red cloth sash that looks 'wet' is that way because the goo leaking out wicks into it. I do every so often soap and water him (and I need to repaint some areas due to that) but enough is on the sash that it makes my fingers slimy if I touch it. Plastic breakdown over time is nothing new, but the unpredictable and cross-reactive nature of some of the soft stuff nowadays is irritating. I see the blast effects and others, and then I look at my 'The Other World' toys, ALL soft plastic, from 40 years ago, and they're fine. But then, they may have had this and simply run out as it evaporated. I don't know.