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In theory, press fit is a more elegant and effective solution (when working with carbon) and should/does provide stiffness benefits. In reality, it is very difficult to make the tolerances work without issue and it is debateable as to whether anyone actually needs that extra stiffness.
For the home mechanic and tinkerer (or really the consumer generally) the move back to threaded seems to be an entirely positive move.
crow
@Super_653
Just watched a video about the Tarmac SL7. Cannot afford but interesting to see threaded BB. Is this the general direction other racing bikes are going, too? I do hope so. And was all that stuff about press fit BBs being more stiff and enabling better power transfer nonsense, or has the frame design just evolved now they so they can have the power but also the threaded BB? I do not know the science but am interested in the thinking behind it. Awaits knowledge with dunce cap