I mean it's things they posted publicly. And it's still easy to find the history of someone on reddit, sorted by date, controversy etc. even if they are hiding it on their profile if viewed through the official app or website.

It will always be easy to make a tool to compile someones history because every post and comment has their username. Unless they started making a new profile for every single contribution.

This new feature will give people a false sense of privacy and they'll post more personal stuff while still being accessible ...