https://www.thecgo.org/benchmark/bring-back-hydrogen-lifting...
Here's a startup focusing on Hydrogen:
https://newatlas.com/aircraft/h2clipper-hydrogen-dirigible-c... https://h2clipper.com/faqs/
The thing is that hydrogen's buoyancy is so high that it lifts up above the dirigible very quickly once released. So fire risk isn't really that great in terms of burns.
The bigger problem is the "lack of buoyancy" of the rest of the dirigible (and the impact with the Earth affecting the passengers). So that's a bigger issue to address, engineering-wise.
It seems until the 1970s flying was like Russian roulette.
https://upload.wikimedia.org/wikipedia/commons/1/1c/Hindenbu...
(Tenerife Airport disaster w 583 fatalities) did not have that impact on using passenger jets.
It just irks me that every time wants to do something useful with a bigger quantity of hydrogen, somebody will come and say 'but Hindenburg!'
You can of course debate the relative safety, but for eye-catching disastrous video material the world of aviation has a thousand times more than airships.