Flex strongly influences board-responsiveness and is one of the most underrated characteristics in kite surfboard construction.
Lately, kitesurfing waveboards has become 3-dimensional. Altitude will call you in as soon as you’ve figured out how to jibe properly.
Dynamic flex and lightweight are useless board characteristics if the board isn’t robust enough to permanently conserve these properties.
Even a Unimog doesn’t come out of every crash untouched, so your board can get cracks if you crash badly into stones or the board of your kite buddy.