>>This is why the Hindenburg caught fire
That's still something of an open question. The most recent thought is that, yes a gasbag had been leaking, ignition came from a sudden static electric discharge when the landing ropes (conductive because they were wet) hit the ground leading to sparks between envelope and frame (electricly isolated from each other 'for safety'). I can think of a dozen ways current tech could interrupt that chain of events.
Also, hydrogen can be a source of electricity (fuel cell) and possibly augment batteries for energy storage...

Then there’s winds moving different directions at different altitudes, but most reliably from E to W. Remember that Chinese spy baloon?