They did have usable file system search decades ahead of Windows.

I mean.. Does window have it now?

Debatable at best..

Everything (the program for Windows) gives Windows very good search, and it's not really doing any magic. It's just taking the NTFS journal and putting a decent GUI around it. File content search is optional and much slower, and indexing of other file systems is done the manual way (by actually searching through the entire file system). The fact that Windows hasn't done what Everything has already done goes to show it's not that Microsoft can't, but rather that they don't want to, unless every single Win32 developer over there has either kicked the bucket or moved on to better pastures.