IMO, every art needs updating. We (humans) learn new things and arts can benefit from these advancements. It doesn’t mean anything is wrong with an art - just that there’s something it can do better. There always is, for every art, every skill.Does wing chun need updating?
Personally I believe the art of wing chun is fine. There may be a case for updating the culture and by extension the training methods traditionally associated with wing chun, but to me this is a different questions than updating the art.
Any update needs a solid reason for being added and the real nature of the problem assessed.