In Kibitzer 1, we looked at Carleton-Tait where White won with 16 Nh3 which I have not seen repeated. 17 c3 N4f5 occurred in a 1982 postal game M.Fiorito-Timmerman, won by Black after a lot of complications. In this game White's weakness at g2 became significant. Bf6 This position also occurred by transposition in Wibe-van Oosterom, where White played 17 h5. 19 Nh3 was played, following a 1970s postal game cited in my Vienna book.
White levers open the position and creates huge complications.
So the variation is still very much open. Moreover, the following game shows a Swedish GM in trouble against a lower-rated opponent in one of White's lesser lines. If you want to enter the ICCF thematic tournament on the Frankenstein-Dracula, it is theme 10, due to start in September and entries have to be with your national CC organisation by the end of July.