Is there any disadvantage in changing all the window glass to toughened?
A lot of my windows are toughened glass and I've been offered an upgrade to all remaining (non toughened) windows to toughened glass for $2500. In the long run I think I'll come out on top since there is a much less chance of breakage with the associated costs and inconvenience.
However, is there any downside in using toughened when I don't need to?