> But wouldn’t a simple interlock (like a puzzle piece) achieve the same result? Yes but puzzle pieces are of different shapes whereas now we have a "monotile"

> But wouldn’t a simple interlock (like a puzzle piece) achieve the same result? Yes but puzzle pieces are of different shapes whereas now we have a "monotile". It is very simple to produce all the monotiles you will ever need because they are all of the same shape. Consider the economy of LEGOs if a single LEGO-shape was enough for everything. That would make LEGO pieces cheaper. Puzzle-pieces would also take considerable effort and expense to put together. There is a reason why puzzles are called, puzzles. With monotiles putting them together is trivial. Now I have no idea what practical applications actually are planned for monotiles in practice. But an invention is still an invention not because it does something that has never been done before, but because it can or may do it more economically, and can be a better solution for some specific situations.