[msrenee]

Do o-rings have a dramatically high failure rate that I don't know about? It can dry rot or otherwise break down, but as a seal on the back of a phone, I've found them 100% reliable.

[tallanvor]

I assume they're referring to the Challenger explosion (https://en.wikipedia.org/wiki/Space_Shuttle_Challenger_disas...), although it's a pretty poor comparison.