Had seen a tweet that assuming a LNG compression ratio of 615, Europe would need 3 times the current LNG transport capacity to carry on with business as usual. Nordstream 1 alone carriew as much gas as Energy behemoth Qatar's entire LNG Exports.. Also, much of the LNG tankers, are on long term contracts to Japan, South Korea and China, and as such maybe only a part of this capacity would be diverted to Europe..
Conclusion: If Russia decides to use gas as weapon, expect a near term industrial collpase in Europe.. What gas europe has will only be used to keep people alive..