There's a ton of unmanned underwater vehicle efforts/prototyping going on. I gotta wonder how many would be slated to become exotic torpedos. XLUUV, Manta Ray, and now LDUUV
<a href="https://news.northropgrumman.com/news/releases/northrop-grumman-completes-assembly-of-manta-ray-uncrewed-underwater-vehicle" rel="nofollow">https://news.northropgrumman.com/news/releases/northrop-grum...</a>
<a href="https://www.navaltoday.com/2024/02/12/us-navy-picks-companies-for-unmanned-undersea-vehicle-program/" rel="nofollow">https://www.navaltoday.com/2024/02/12/us-navy-picks-companie...</a><p>They do seem to be the opposite end of the spectrum; expensive & fancy. Where-as right now the focus everywhere seems to be on "attritable" arsenals, rather than advanced.