Current limitations of solar sails include their requirement for large, lightweight designs that are challenging to deploy and provide only minimal acceleration. This makes them less efficient compared to ion thrusters and chemical rockets, which are more reliable and faster for space travel. Hydrogen blistering is mentioned as a potential issue, but the discussion does not elaborate on its significance. The technology is not widely used due to these performance constraints and the availability of more effective propulsion methods. Overall, solar sails remain a niche option in spacecraft propulsion.