[Gravityloss]

From the article:

> Fully loaded vehicles have a ratio of payload to dead-weight of about 1:1, which is up to three times better than conventional alternatives

Might make sense for a small system.

But electric machines have made huge advances in the last decades. Frequency converters, DC-DC converters, high torque permanent magnet motors etc are now very commonplace.

For example in the workshop, electric tools have supplanted pressurized air ones.