Posting format is different

[Tiberius]

Also it wastes database space.

Unless people are quoting and requoting the Encyclopedia Britannica, or you are limited to 16-bit # of records, then no, not really.

There's a lot of metadata stored alongside each post. That metadata adds up when person posts multiple times without editing their post.

Also the indexing of the posts table in the database gets increasingly large and takes more time to search, among other things.