Tegmark's paper does seem related in that it is arguing that proposals like Bartini's might produce a universe that is 'dead'. It seems that Tegmark's paper is suggesting that only 4 dimensional (3+1) universe produces a world with 'observers'. The math is beyond my ken.
AFAIK he was also a mystic of a kind and what we would call a "fringe scienctist" in today language. Which makes a curious case when such a character actually builds serious sophisticated working products like cutting-edge airplane designs. The latter leading to a clue that his theories may be worth exploring (they still can be wrong, but there is a chance of finding some interesting food for thought there). Another example of an inventor of similar kind coming into my mind obviously is Nikola Tesla.
Time has at least three dimensions. I consider at least six but possibly twelve.
A future imperfect that has yet to be experienced would be three relative time of origin, thus six, relative to the observer, allowing for an additional six and total of twelve.
