I sail in a location with variable winds and a boat is powered by the foresail.
...for a quick response to increasing wind (if your caught with too much sail up):
flatten (depower) main ...go for small changes
spill main ...quick release
reef main ...easier than a head sail change
drop, reef or change head sail
I have a great heavy cloth number 4 that reefs... in medium winds allows for a close sheet using tracks inside the shrouds for great pointing ability
"The sail, the play of its pulse so like our own lives: so thin and yet so full of life, so noiseless when it labours hardest, so noisy and impatient when least effective". -- Henry David Thoreau