I would think the tremendous mechanical simplicity of FF would also be a huge benefit in space propulsion applications. Slough’s approach requires precise delivery of metal liners once every minute, which has to have a lot of mechanical overhead (in terms of complexity and weight), and introduces reliability issues. One of the beauties of the FF approach is how physically simple it is, with no moving parts apart from valves to deliver the fuel.
I guess that if the issue is crewed applications, with the possibility of directly addressing mechanical problems by on-board staff, then the extra thrust is worth it. But I would think that FF would be ideal for robotic deep space exploration, with its potentially high Isp and reliability.
