Would it be beneficial to land Falcon Heavy's side boosters on droneships too?

Question

Although the synchronous landing of the Falcon Heavy side boosters looks impressive, they seem to have traveled a long way back to the landing zones.

How does this compare with Falcon 9 launches with land landing?

Would it have been more efficient in this case to land the side boosters on additional droneships?

I'm interested in whether the amount of droneships was a bottleneck here, or if the way it was done was actually the best option.

Also, are there any plans known for possible multi-droneship missions?

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Update:

• Good point by NPSF3000: Elon Musk has estimated the costs for landing the side boosters while expending the core to be around \$95M. This comes along with ~10% less performance compared to fully expended, which would cost $150M.
• SpaceX is actually building a second droneship on the east coast do do exactly that. Its name will be A Shortfall of Gravitas.

Answer 1

Currently SpaceX has only one drone ship in the Atlantic, Of Course I Still Love You, so it wasn't an option. As far as I know, they aren't planning to build more; their goal is to do as many return-to-launch-site (RTLS) landings as possible in the future.

Landing all three on drone ships would allow them to expend more fuel in boosting, increasing the potential payload of a Falcon Heavy launch, but it would add several days of sea travel to the turnaround time of a booster.