[LeifCarrotson]

Search is not an operating system function. It needs read access to every file you want it to find, but other than that it's just another application.

Windows has great engineers, yes, but the problem with Windows search is not an engineering problem, it's a trade-off between different use cases and performance and compatibility and innumerable other factors. Design by committee and circumstances of history made Windows search what it is, the shortcomings aren't caused by a lack of engineers capable of building Everything or Spotlight or grep or Google or whatever your ideal file search tool looks like.