system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is glass the dominant window material, as opposed to higher-grade plastics?

I understand why car windows should be glass, given the high speeds, and potential benefits in a crash. For home windows or buildings, I would guess that plastics might be more durable, longer-lasting, and potentially cheaper. I assume I'm wrong and someone must have put far more thought into this than me, so I'm curious to hear what that is.
gpt
Glass is far more durable than any plastic, most significantly it doesn’t degrade due to UV exposure.

It also does not let UV through which protects the interior. Items in plastic conservatories will bleach much faster than in glass ones.