I was looking at air purifiers yesterday, and it suddenly came to me that they all have capacities rated in square feet. Since they are made to filter the air inside a three-dimensional space, wouldn't it be more appropriate to rate them in cubic feet? Although, it seems to me that a really accurate representation of their capacities would be cubic feet per minute or something like that.
One other thing. When it comes to bladed weapons in Dungeons & Dragons, why is the druid restricted to the scimitar? This makes no sense. Druids were Celtic, and the scimitar was Persian. Yet another reason why I mostly ignored or revised weapons restrictions when I was Dungeon Master.