Safety

Safety at the sea is a key factor for every seaman.

UNSINKABILITY
Trimarans are because of theirs foam sandwich construction and lack of heavy (keel) ballast unsinkable, even being heavily damaged. They don't rely on waterproof compartments which also could be damaged, but on the fact they are lighter than water. That means, even having all three hulls full of water, they will stay afloat, high on the water, even able to sail. No matter how big damage is, there is no need to abandon the boat. Trimaran is the safest liferaft available.

CAPSIZE
Common thinking among sailing community is that trimarans are fast boats, but can capsize, something which cannot happen with keel boat.
Trimaran when pushed beyond the limit can capsize, but that should be huge operating error, knowing how extremely stable trimarans are. If happened, mostly on racing circuit, they stay almost completely out of water, floating very high, providing safe and dry shelter for the crew. They can go out through safety hatch, well above water level on the nets if wanted. So far, all capsized trimarans were rescued and sailed again without mayor damages.
Keelboats can't capsize, (as long as they have keel on the place) but only in moderate winds and waves.
In the rough seas, just because of keel which is preventing boat to slip sideways, they can capsize being pushed by big side wave. If happened, result is heavy damage of the hull, caused by broken mast, or just water entering, both resulting in sinking. Leaving the crew in the small liferaft if they are lucky enough to escape on time.
Every excessive water inlet can sink monohull putting its crew in danger.
Almost every trimaran capsize is well documented in media, just because there is an attractive upside-down yacht afloat, with saved crew.
Opposed, when monohull sank there is nothing to film, just report of the crew search.
To prevent capsize, trimaran skipper must know that his vessel is at least twice faster than equal size monohull. Similar like racing car, even trimaran can suffer if pushed beyond the limit. With the racing car that means crash, with trimaran capsize. 
Trimarans are much faster than any other sailing yacht anyway, there is no need to "push the throttle" to the bottom.

BAD WEATHER ESCAPE
Having superior speed, trimaran can always escape from low pressure systems, putting its crew on the safe course, much more efficient than monohulls.
Every good seaman will recognize and appreciate that ability.
Speed is not just dangerous, often can save lives.

STORM OPERATING
Being extremely stable, with possibility to lift up daggerboard or centerboard, trimaran can easy slips sideways, being pushed by huge wave. This feature prevents it from capsizing, just opposite keelboats.
Also, trimaran offer flat sailing, making safe platform to trim the sails, or just hide inside.
Capable to resist all kinds of bad weather trimaran is the safest sailing yacht available.