Author here: the gist is that it's practically impossible to scroll to the beginning of an iMessage chat, and that's the only way to get to the beginning of a conversation. These old conversations take up several gigabytes of space, yet there's no good way to search them (because search for old messages is unreliable).

This aspect of the iMessage user experience has remained untouched for a decade, despite everyone's chats growing longer. Searching for particular iMessages sucks because the results miss the broader context of the conversation (a single message is not useful when you want to reread a conversation).

(Also just noting, as the post author I created a title better-suited to HN's 80 character limit.)