there is a new video from mumbo jumbo () and i think if enough people start trying to beat his record it could be a good catagory

he also made rules:

• Must build and active all of the redstone contraptions, and show them functioning.
• Can use any blocks/any designs. No command blocks/structure blocks are allowed though.
• Timer starts from the first interaction (e.g block breaking, block placing)
• Timer stops on the activation of the final redstone contraption. but i would add that the run would have to be in a certain version as redstone changes quite a lot