The answer to the druid and metal armor is excellent. Not so much the ruling itself, but the clear way it explains that classes have both story and game elements, and some classes have more story elements than others.
I like the comparison of druids wearing metal armor to vegetarians eating meat. Makes it easy to understand and easy to when considering if one wants to change (either as player or as DM not caring about that part of world-building).
I'm going to go out on a limb here and guess that you are a) not a vegetarian and b) don't know any vegetarians.The comparison is decent, but not strong enough for me. A druid's feelings toward metal armor and shields is more like the Jewish or Muslim aversion for unclean meat and pork. Much more serious consequences there than just a vegetarian eating meat.
If a vegetarian hasn't eaten meat for a long time, having meat in their digestive tract is quite likely to cause an exploding vegetarian, IYKWIM.The comparison is decent, but not strong enough for me. A druid's feelings toward metal armor and shields is more like the Jewish or Muslim aversion for unclean meat and pork. Much more serious consequences there than just a vegetarian eating meat.
I'm going to go out on a limb here and guess that you are a) not a vegetarian and b) don't know any vegetarians.
If a vegetarian hasn't eaten meat for a long time, having meat in their digestive tract is quite likely to cause an exploding vegetarian, IYKWIM.