Open chambered vs closed chamber forks

[dylanash]

Does anyone have any expert opinions/facts about open and closed chamber forks?

Is it worth upgrading the kx500s suspension to closed chamber forks? Or just re valving/redoing the factory open chamber setup just fine.

Type of riding makes a difference i know, me personally I would like to know for enduro racing/harescramble, but for everyone else for supermoto and motorcross as well would be great.