I've encountered several people in the Kagyu and Nyingma traditions who say, "Oh, we, you know 'tukdam,' yeah, people go in 'tukdam,' "but it's like, you know, not that big a deal. It's, we don't care that much." Part of the reason they don't care that much is that the idea that you need to go into this completely, kind of, a state where there's no phenomenal content— that's just a pure clear light mind— actually is something that many of the contemporary practitioners and teachers in those lineages don't agree with.