Comment by tejtm

Prince Rupert's drops were mentioned in the article, plain window glass material, sufficiently stressed, is ridiculously tough.

try a web search for Prince Rupert drop vs bullet

https://duckduckgo.com/?q=prince+rupert+drops+vs+bullet&t=lm...

The article author did not say how a cable could be wrapped in pre-stressed glass but that plain glass can be pre-stressed is encouraging.