In pages like this, where there are a lot of discussions, the previous system is at the moment better of Flow for these reason:
1 - To see all the discussions, you need to go to the bottom and wait that the older discussions are loaded.
2 - While the older discussions are loading, there is nothing that inform the reader about this loading (e.g. balls or an hourglass rotating), so one can think that there no discussions any more.
3 - I don't see any index at the top of the page to check how many discussions are in the page.