What is the current LNG trade trend?

"Nowadays LNG trade is shifting from longterm contracts toward the short and medium term.This gives a more flexibility to buyers that prefer to do not restrict themselves.Buyers also tend to participate in all the LNG value chain for reducing the risk.On the other side sellers also tend to keep an extra capacity for sales in spot market and benefit of higher price. "

This are common ideas that one can see in the LNG literatures.How much are they right?I myself examin the LNG contract period durig 20 years ago and I get to this result that LNG contract period have a tendency to reduction and the share of LNG spot market is increasing. Is this a good sign?It seems that it depends on energy market situation.When buyers are concern about the energy security so thay tend to assure supply by long term contracts.Because of this all traditional LNG contracts are based on long term with Take or Pay mechanism.On this atmosphere financiers have a more incentive for investment.More investment lead to more energy supply availability and finally lower price.So both sides benefit from long term contract.Buyers get a gain due to lower price and supply stability and sellers could finance project cost.Then why does the market trend go to short term contract?