It'll be interesting to see whether this has an effect on the nature of upvoting. If saved comments were slightly more structured, rather than just one big list

It'll be interesting to see whether this has an effect on the nature of upvoting. If saved comments were slightly more structured, rather than just one big list, I could imagine them comprising some sort of 'personal knowledgebase'. In turn, that might decrease the amount of 'I agree with that' opinion upvoting, in favour of 'that's useful information'. Whether that's to be encouraged is, of course, a personal opinion.