Swept back hull appendages. A thing of the past?

Paul Scott said:

that does beg the question of where the upwash washes up to on the stern hung rudder- just on the leading edge? On the whole foil? If the upwash is mainly on the leading edge, can envision it climbing up on the leading edge, and collapsing into a trough mid section leading to
ventilation, to say nothing of a wave knocking the rudder into ventilation. Depends on the foil- one strategy among windsurfers is to have the surface piercing part of the skeg a different section that doesn’t develop as much lift, and that seems to tame ventilation.
Interesting read on Fins | Windsurfing Forums, page 1 - Seabreeze https://www.seabreeze.com.au/forums/Windsurfing/General/Interesting-read-on-Fins?page=1

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