ANYWAY...
The explosion at Nedelin was a test of a rocket about the same size as an American Saturn V, right?
I noticed' on the U-tube videos' provided, that instead of building the 1st stage with a fewer number of larger motors, like the Saturn V's 5 F-1 engines, They used thirty (30!) smaller ones. That made something that was already very complicated, even more so-and since all 4 test vehicles' didnt' make it (They all blew up in some way or another) I'd have to say that is why It's better to follow the K.I.S.S. method.
K.I.S.S. being Keep It Simple, Stupid.