Well, actually, dry vipassana usually refers to those people who develop vipassana in the complete absence of samatha. The (Abhidhammika) students of Sujin Boriharnwanaket may consider themselves suddha vipassana yanika (One who's vehicle is insight only), but I don't think they are the only ones.
The different strands of the Burmese Vipassana sub-traditions, to my knowledge, use both samatha and vipassana at different points.
Does it work? To be honest, I don't know Daniel. I do have great confidence in the efficacy of my own tradition and I think life's too short to jump ship.
“No lists of things to be done. The day providential to itself. The hour. There is no later. This is later. All things of grace and beauty such that one holds them to one's heart have a common provenance in pain. Their birth in grief and ashes.”
- Cormac McCarthy, The Road
Learn this from the waters:
in mountain clefts and chasms,
loud gush the streamlets,
but great rivers flow silently.
- Sutta Nipata 3.725Compassionate Hands Foundation
(Buddhist aid in Myanmar) • Buddhist Global Relief