I think screenshots are kind of normalized already. They are detached from the original and we accept that we can’t alter those. Integration, however, is another thing as we can now define how in sync it should be. Anyway, even our chat is already proof of the point :-)
Yeah, I think in technical sense the best way is to retrieve the linked post as some package (ZIPped JSON, for example) and cache it for a while. And then check once in a while if the original has changed. So you can display latest available version of the original was removed.
However, this way sparks another conversation about if original author have a right to take his words back (remove/edit the post).
There is a potential problem with deleted posts, however. Basically, screenshot is less likely to be removed than post. Same issue as with leaving hyperlinks vs. copying content.
You’d want to also consider, that desktop components were not created for 24/7 usage. My previous motherboard died by overheating south bridge – it likely wouldn’t happen in a desktop usage, but 24/7 didn’t let it cool ever. The chip has a small ‘volcano’ in the middle now.