I think i have. I don't think it will be any better or any worse..
So no benefits.
But lots of cost and disruption. Loss of rights. Loss of access to the single market. Additional customs and bureaucracy on imports and exports. New border posts. Reduction of inward investments. Companies (such as Rees-Mogg) setting up new offices in the EU.
Did anybody ever tell you what a cost-benefit analysis was?