The problem with hydrogen as an aircraft fuel is - and always will be - storing it on the aircraft. While H2 is very light for it's energy density, it's not dense. So you need to dedicate massive volume to the fuel tanks - and even then you either need it in liquid form (very, very cold) or under extreme pressure. High pressure is viable for ground use (e.g. automobiles) where weight is not critical, but impractical for aircraft.
Problem is liquid H2 isn't much better. You still need very large volume for any appreciable range, near the CG so the aircraft remains controllable as the fuel burns off, and you need a giant thermos bottle to hold it.
Wing storage of the fuel is not longer viable - so unless you want a huge H2 tank in the middle of the fuselage, you'll need massive pods of the stuff on the wings (lots of drag).