I am wondering how likely is it that a Katana (samurai sword) made today (potentially using modern technologies and materials) could be superior (sharper or more resilient or better in other ways) to one made by something-century crafted Japanese blacksmith (limited technology but with the intention of making as good as could be for actual use in war)?
a) For a normal Katana you can order online
b) for a special order that wants it as good as could be with a budget equivalent to a new ferrari.