Just asking for a friend: what makes this such a great scientific achievement? of what practical use is it? Can it be used as a means to solve other 'hard' math

Just asking for a friend: what makes this such a great scientific achievement? of what practical use is it? Can it be used as a means to solve other 'hard' math problems? can it power a hyperdrive? a time machine? practically infinite energy without carbon entanglement? Please ELI5, even if I AM well in excess of 50.