Is this something that has been rigorously studied? Like multiple follow-ups?

This article is from 2002 - twenty years ago. It cites several other studies, which seem not great overall.

One studied a driving simulator, the others looked at deaths in the single year after lowering blood alcohol.

The one about minors in Maryland seemed especially strange, as minors are usually required to have 0% BAC.

It sounds like cherry picking.