As the US vaping market begins to adapt to a new regulatory environment there are real concerns that the FDA (Food and Drug Administration) may have overreacted to the potential threat from vaping. As of today all products brought to market after 2007 will have to be submitted to the FDA for rigourous testing which will be extremely costly. Only products which have been passed by the FDA will be available for sale to the US public.
When you bear a mind the number of products which have been brought to market after 2007 we can only guess at the potential backlog this will create. That is assuming the underlying companies have the finances available to go through the costly application process.