Why should I switch to golf cart 6v batteries

Had to google ruthenium batteries. Apparently an advanced take on lithium technology ("Ruthenium nanocrystals as cathode catalysts for lithium-oxygen batteries with a superior performance"). Lithium Iron Phosphate charge great for dry camping. We have 14 months success with them (9.5 kW-hr or so). Solar charges linearly (after inefficiencies through controller etc). We are at absorb (57.6 V charging rate) in several hours (unless we run fridge 24 hours straight on AC and we are at -3500 W-hr or so deficit in morning) and are then done to float (54.4V) by noon.
Reed and Elaine