Could this energy density provide a good enough Wh/kg ratio for general/leisure aviation?

Since I have not seen it yet in the comments, I use Floorp, a Firefox fork with some nice UI improvements (and apparently some performance improvements, but both are very fast for me).

Even a “traditional” password would have a “list” that attackers could know (all the possible characters that can be used in a password), now compare this set of ±150 characters with the set of possible words that can be used (probably close to 250k per language if you take out some similarities).

Even with only 4 words, the number of possibilities is astounding.

Not taking a position on this, but I could see a comparison with doing an electron scan of a painting. The scan would take an insane amount of storage while the (albeit ultra high definition) picture would fit on a Blu-ray.