Drivechain is just big blocks in a different way. It doesn’t solve the scaling issue, it just moves it to a new location and replaces user keys with miner votes. But the scaling problem remains the same, and largely dumps it on miners who now have the explicit option of voting on something they don’t even have to verify. Then it tries to hide the fact that it doesn’t really solve anything, behind a 6 month time lock… which is the entirety of its real attempt at securing ownership, hoping that 6 months is long enough to enforce whatever the truth was if there are no validators when things go wrong.
But that only exposes the problem rather than fixing it, you could just slap a 6 month timelock on literally any L2 and then say “see, what are the chances the rightful owner doesn’t get their funds now?”