Planet-type feeds generate a massive amount of posts per day which can easily flood you and generate a huge database file. Typically one is not interested in reading each and every post, but check the general mood and see where things are going with the community. You can't possibly read all posts in these cases.
This doesn't explain why you'd need a hard limit here. It seems that a time limit would work just as well.
Re: Call for feedback: is the option to "Store no more than __ l
This doesn't explain why you'd need a hard limit here. It seems that a time limit would work just as well.
ancestor,
creator of Brief