[rchaud]

Interestingly, I can still log in and post (and get replies) on Old Reddit with my 15-year old username and pw (no email or other form of auth needed). I remember trying to log in using that acc via New Reddit and it said that user didn't exist! I wonder if Old Reddit-era accounts are on a separate DB.

[dogma1138]

More likely that new Reddit has crude input validation on the fields and throws an error if there is no email in the username.

You can probably validate this theory with a basic time based analysis.