Desert general mob farm

potato_noir's general mob farm, the second half of an hour long video whose first half is a takedown of farm channels that reupload other people's designs without credit. The build is Etho and gnembon's mob farm rebuilt with modern parts: twin boat clocks, upside down dispensers, a non spawnable centre and a super smelter turning the bones into bone meal. It comes in small and large versions with desert and ocean variants, and the design goals are stated up front rather than dressed up as "the best".

• From 1.21.11 the desert version loses about half its bones, because a new skeleton variant spawns there under husk rules. potato_noir says build in an ocean if bones are what you want, since the desert now returns more gunpowder, string and witch drops instead.
• On Bedrock water runs straight through trapdoors, so hold it back with pistons, and expect the boat clock to need reworking on top of that.
• Boat clocks are directional and drift out of sync. Several builders prefer the single clock version that sends the signal down a wall stack, which is one of the schematics below.
• FrunoCraft turns up in the comments himself and suggests tripwire hooks with a small pulse extender, flushing the kill platform about three seconds after the last mob arrives.
• Rotten flesh is not waste, clerics trade it, though one builder points out you will make far more than you can ever trade away.
• One builder replaced the item sorter with copper golems and found it much cheaper, with the sorting continuing while they were away.