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Re: Why a racer for cruising discussion...
I think Petercheck pretty much nails it for long term cruising boats (post #3) .... immersion factor, or how much a heavily loaded boat sinks into the water when filled to capacity with cruising stores. Purpose built long distance cruisers/passagemakers typically have more 'stowage capacity' and when fully loaded with stores wont be wallowing against a deeply submerged waterline.
Also for long distances, a boat that 'snaps' on every wave can become quite tiring in comparison to a more 'sea-kindly' boat ... theres a big diff. between a 'slow roller' and a 'snappy' boat when it comes to 'roll period'.
Also too structural fatigue can be a concern for long distance/long term, a heavier 'beefed up' boat will typically have a higher inbuilt 'structural factor of safety' which prolongs the time frame of 'endurance limit' in total stress cycles (rigging and hull). Generally, a 'flimsy' is certainly going to come apart faster and become 'structurally tired' sooner than a 'crab crusher', although composite structural design keeps getting better and better during this current 'evolution'.
"Sea-kindliness" is probably more important than ability to 'quickly accelerate' when youre 'cruising' ... especially if you havent worn a wristwatch for many years!!!! A crab crusher with a 'rounded power-bow shape' will 'blast its way' through the real steep stuff due to is momentum and latent inertia, while the 'flimsy' will tend to pound and pound (and possibly get stopped) and pound again until your dental fillings loosen and fall out.