This is a great point on Tao of Mac:

Spotlight has been a complete mess for years, and Apple has done nothing to effectively fix it on any of its platforms–and it would be a perfect place to start integrating AI in a way that would actually make sense and be useful to users.

Spotlight has needed attention for a while. Sometimes works great, sometimes feels like it lags or gets confused about its search index. Finder search is also clunky, could be scrapped and unified with Spotlight.