“Drivechains, and several earlier sidechains ideas, are not a scalability improvement, but merely enabling users to opt-in for another security model.while obviously any future with wider adoption will need different technologies that have different trade-offs, and anyone is free to choose their security model, I don't think this particular one is interesting.

In terms of validation cost to auditors, it ls as bad as rust a capacity increase on chain, while simultaneously adding the extra risk of miners being able to vote to steal your money.”

Cheers,

Pieter