Thanks. I didn't know there was a 401k Roth.
They haven't been around very long. I'm guessing six or eight years. Companies have to opt to offer them. I think it's becoming much more common as people realize the advantages and bug their employers to offer them. My wife's employer was an early-adopter and we've taken advantage of it for her from the start. About 2.5 years ago, I got a job at the same place she's at so I'm also on board now.