How much of that is survival bias? We've only found a few timbers from the roundhouse buildings, and I don't think any of the old Germanic mead/feasting halls o

How much of that is survival bias? We've only found a few timbers from the roundhouse buildings, and I don't think any of the old Germanic mead/feasting halls other structures still exist. In the American SW, adobe mud construction is worn down easily by rain, so is rebuilt often in order to persist, and neither traditional Hawaiian hale, made with thatched pili grass, nor sod houses would last 30 years without a lot of maintenance. Certainly an igloo is a traditional architecture style where the result is meant to be thrown away.