The individual Falcon turn-around is slow (months of refurb), and the record half-month ones swapped some engines. B1067's 30-reuse is a ship of Theseus rebuilt over 4+ years.
Feh, swapping engine is not an option for the first few initial Mars trips, unless its payload also contains engines (can't imagine the scissor-lift payload either that needs to go with).
egberts1|3 months ago
golden-dome|3 months ago