Forget about senseless considerations about keel shape. It is the hull
shape and proportions that decide how a boat goes through the water.
What really matters is sailing ability. As far as offshore
sailing goes, the reality is that the average wind speed over the oceans is less than 15 knots. If your boat can't sail well in light winds, you will either be stuck rolling around in the swell or motoring - now doesn't this sound familiar?
One characteristics of long-keelers is very high wetted surface and it makes them stick to the water much more. On the other hand you can only carry so much sail area over so much deck
length before starting to grow bowsprits and other cumbersome arrangements.
The ratio between sail area and wetted surface is very important for ocean cruising. A boat sailing gently is much more comfortable than one rolling around or motoring.
I owned a 30' Dufour
Arpege for many years and crossed every ocean with it. It was outstanding in light winds and regularly beat much larger yachts on ocean passages, because it hardly ever stopped. It is not how fast you can
go that matters, it is how slow you don't
My Arpege was comfortable most of the time, and when it wasn't other boats the same size wouldn't have been either if they had been sailing the same. If you don't like it, you can slow down or let fall off a little; slow heavy boats can't speed up or point higher when conditions are good.
Comfort goes up with size and motion is not everything. Small boats that are too heavy are awfully wet and the sea likes climbing aboard in bad weather
The Arpege was an old racing
boat with an early fin and bulb keel and fairly rounded sections. You can pick them up very cheap
today. They sail great and can sail into unbelievable weather
Today I sail a high-performance 43' alloy sloop
and it is more comfortable again. It sails
flatter, hardly pitches in the sea and I get much more mileage for the same effort or less. If I match the performance of a long-keeler or any other heavy cruiser, it is more comfortable because I am hardly straining anything while they are heeling hard and hanging on.
If I drive it upwind full speed in a rough sea, it can get a bit noisy occasionally, but it is dry. Sometimes I slow down just by pointing a bit higher again. I can do things they can't even dream of, as well as turning on a dime whenever needed.
The boat is one part of the story, how you sail it is the other - provided you can get it to go. Too many so-called cruising boats of all types today are shocking sailers regardless of keel configuration. Too heavy, too much drag, too much windage. If you really want to sail the distance, then get a boat that can sail for a start and don't mess it up.