Interesting economics due to the rarity of Falcon Heavy launches and the frequent sacrifice of core boosters. B1091 is configured as a center core but will be used as a solo booster for a few times before being used as a center core. They rarely attempt recovery of the center core and the attempted recoveries have apparently all failed (likely due to recovery being far out to sea with greater risks of rough seas both at landing and return of the droneship).
Whereas SpaceX has previously converted boosters between conventional and side use (e.g., B1052), they have not previously otherwise used a center booster.
