Rudy Arthur takes an academic look at the problems behind W3W – https://arxiv.org/pdf/2308.16025

It concludes:

“Contrary to what W3W claim, this work has shown that many confusable W3W addresses
are likely to exist and has identified some serious problems with the W3W algorithm […] I would caution against the widespread adoption of W3W […] W3W should not be adopted as critical infrastructure”