Lots of transactions already happen off-chain. Payments between coinbase accounts are all off-chain, but in a way that requires lots of trust in coinbase. Lightning allows that to happen without any trust. Also segwit is completely different to lightning, all it does is fix the maleability bug which will allow for a lot more functionality and it provides a capacity increase. The miners opposing it are incredibly stupid. They fear off-chain transactions will eat into their profits, they couldn't be more wrong.

The scaling solution BU wants is only a short-term fix, and they are not even capable of doing that. Even if I agreed with the views/ideas of BU team, there is no way I would dare install their software on my machine, it's way too risky to run something so broken and vulnerable. I wish I could gather up every hard disk that contains a copy of BU and launch it into the sun. BU is not my favourite node software.

Core vs BU is technology vs conspiracy