Keyboard copy paste works great in Windows
Yup, mostly works in Windows. But now go to a 'Mac-like Linux distro' - can you copy an image in your web browser, paste it into your mail client, chat client, or word processor? What about a vector image, do you get a resizeable PDF or something rasterised? Does it work with video? If you drag a folder from the file manager into a terminal, does it give you a correctly-escaped path (actually, this one seems to have started working in the last couple of years in most DEs)?
I try to limit remote anything from running on my machine.
Searching documents is not an OS function. Head back to userland.
It's a desktop environment function, which is part of the 'Mac-like distro'. And it's a nontrivial one. Spotlight provides an API (albeit a really crappy one based on COM of all things) that allows every app to provide a plugin for full-text indexing of documents. When I install a new app on OS X, every document created by this app is searchable via a system-wide search. If I want to see all of the documents containing a search term, I can easily, even if they're something like PowerPoint presentations or PDFs (or strings in video or audio file metadata). OS X also ships with a bunch of plugins for common file types. I believe that Windows search does something similar. A few DEs have some kind of similar search, but without the kernel support for something like the fsevents framework on OS X they're often stale and without plugins from most apps they only usefully index a tiny subset of documents.
We've got this without your advice.
And this attitude is why most Linux DEs suck.