The few times I tried using the "all" option, it took an unnecessary long time (by my estimation) to load coupled with the cloudflare verification I've to pass to prove I'm human to get through. That's unnecessary stress for me. I rather read page by page. However, I don't know if the cloudflare thing happens once a day if I used the "all" option or within certain hours after using it the first time in a day because there are a few time I've had to use it that it didn't pass me through that verification stress; just like now that I tried it several times within a few minutes.

Again, the "all" option would mean I'm more likely to miss a particular poster I may want to quote later as I may not remember on what page I read their post if I'm trying to recall. You know how you get to read through and then you suddenly remembered you want to react to what another user said in the midst of reading another user so as to yolk both comments in your post, right? That's it.