I THINK THIS HAS TO DO WITH APP PERMISSIONS. IF YOUR APP NEEDS A PLACE TO READ/WRITE FILES, IT MAKES SENSE TO KEEP IT OUT OF YOUR DOWNLOADS FOLDER THAT COULD CONTAIN SENSITIVE INFORMATION LIKE BANK STATEMENTS OR OTHER THINGS. YOU DON'T WANT SOME RANDOM APP LOOKING AT EVERYTHING THAT ENDS UP IN YOUR DOWNLOADS FOLDER!!!
GET RILED ABOUT GIVING THESE GREEDY DATA SNOOPING APPS THE LEAST PERMISSION POSSIBLE!!
The cold cast iron has a lot more thermal mass than cold air in the oven. If you think about it, heating up the inside of the oven is all about getting the inside surfaces and racks sufficiently hot to offset hot air venting. The oven will have to transfer heat into the cast iron to effectively turn it from a cold thermal battery into a warm thermal battery. That will likely add time to the preheat, because it is more material to heat up than just the surfaces and racks.
SOUNDS LIKE YOU NEED TO START DOWNLOADIN PICTURES OF MOTORCYCLES AND BAMS!