That’s a great point about the weed in the lake. However in the ocean i see opposite experience. There is always a lot of trash floating on the surface (old fisherman net remains, seaweed, plastic bags, sticks etc - much more than we realize) and jetboard acts like a vacuum cleaner, sucking all this crap inside the propeller every single time… If small seaweed is usually ok, it goes cut and goes through easily, but the fisherman net remains, ropes and worst plastic bags get wrapped around propeller and kill the torque instantly, resulting in a faceplant…
With efoil the propeller is not a jet, so it is not sucking anything inside + it is UNDER the level of the water so there is always less crap there.
However underwater logs and ropes and nets are a very big issue for a efoil. I hit couple of times and you fly away instantly.