I don't think electric sailboats are going anywhere
I disagree- I use an electric drive system on my C22 and it works awesome. Total cost was about $500 for an 82lb thrust saltwater trolling motor, 2 large deep cycle batteries, and a promariner 3 channel shore charger. Total weight is about as much as a motor and fuel tank, but the batteries are near the keel instead of the transom. I don't know the full battery life (never ran them dead), but it move the boat at 3-4 knots for many hours. I use it only for docking and for pointing windward when raising and lowering the sails.