If you want a one stop shop to get all the necessary information in an efficient time then megathreads are great.
Strong disagree. My experience with megathreads is primarily being full of memes and puns, with so many hundreds of root comments that even using extra tools it was impossible to follow any real conversation or updates.
It's also good at stopping a specific type of content from taking over a forum...
That is the only thing megathreads accomplish, IMO.