I don't think it was evident that individuals and businesses would be willing to make some of these changes they have. For example, German companies are planning on shutting down factories for the winter. Cities are planning on ending night lighting.
In addition, winter so far has been fairly warm. It may still turn cold, so Europe isn't out of the woods yet.
Finally, the increase in the LNG supply was achieved incredibly fast. If someone had predicted Europe would have the LNG supply they do today at the beginning of the war they would have been dismissed as a utopist.