One of the biggest threats of Lightning Network is that, with a huge network of open channels, forking will become very difficult. It makes BTC subject to capture by adversaries.
BTC is already captured so..
It'll end as fractional reserve banking as it separates people from their coins which will only be represented in IOU's so the hubs could start selling their available liquidity for a fee
Unpopular belief: I actually like the lightning network and see it as a good invention. It will give on-chain BCH tx's a run for it's money...
If a hurricane hits Florida and cuts off their power, could LN peers close their channels with Florida residents in an unfavorable state leaving them without recourse?