What happened to "stoner" comedies?

Half-Baked. Happy Gilmore. Billy Madison. Grandma’s Boy. Dude, Where’s My Car? Where have the movies like this gone? Clerks 3 was, I think, the last good one I’ve ever seen (and even they got too real and too sad so I don’t even know if I ever want to see it again as a comedy). There’s gotta be some good, funny shit...