README.md: expand on docs

README.md

@@ -3,20 +3,40 @@
 This tap exists to support macOS FUSE-related software that have been dropped from Homebrew core.
 
 ## How do I install these formulae?
-`brew install gromgit/fuse/<formula>`
+
+First, if you've already installed FUSE formulae from the core tap _before_ they were disabled, you might _not_ want to switch over to my formulae, because:
+1. As far as I know, Homebrew will not remove them from your system, even after the formulae themselves are deleted.
+2. Many of these formulae are rather old, so you're unlikely to find updates anyway. 
+
+But if you _do_ want to install my formulae over the core ones, you should uninstall the latter first:
+```
+brew uninstall XYZ
+brew install gromgit/fuse/XYZ-mac
+```
 
 ## Documentation
+
 `brew help`, `man brew` or check [Homebrew's documentation](https://docs.brew.sh).
 
 ## FAQ
 
 ### Why is XYZ not available?
-Probably because I haven't gotten around to putting it in yet. If you need it, [file an issue](https://github.com/gromgit/homebrew-fuse/issues/new/choose) and I'll see what can be done.
+
+Possible reasons:
+1. All available versions of `XYZ` require version 3 of the libfuse API, but macFUSE only supports v2.
+2. I might not have gotten around to getting it up. [File an issue](https://github.com/gromgit/homebrew-fuse/issues/new/choose) to get my attention. 😀
 
 ### Why is XYZ so old?
-Maybe I just haven't gotten around to updating it yet, but a significant subset simply can't be updated until MacFUSE supports version 3 of the FUSE API. These will be labeled as such in their _Caveats_.
 
-Other formulae seem to have been abandoned by their authors. If you know of a revived fork of such software, [file an issue](https://github.com/gromgit/homebrew-fuse/issues/new/choose) with the details and I'll see what can be done.
+Possible reasons:
+1. Current `XYZ` requires libfuse v3, so I found and bottled the last version that requires libfuse v2.
+2. `XYZ` was abandoned by its authors. If you know of a revived fork of such software, [file an issue](https://github.com/gromgit/homebrew-fuse/issues/new/choose) with the details and I'll see what can be done.
+3. I might not have gotten around to updating it yet. [File an issue](https://github.com/gromgit/homebrew-fuse/issues/new/choose) to get my attention. 😀
+
+### Why is your formula called `XYZ-mac`?
+
+To avoid a naming conflict with the formula called `XYZ` that still exists in Homebrew core.
+
+### Why is the XYZ _program_ installed as `XYZ-mac`?
 
-### Why is the XYZ program installed as `XYZ-mac`?
-Some formulae (e.g. `rclone`) are still available in Homebrew core, just without FUSE functionality and dependencies. My FUSE-enabled binaries for these formulae will always be name with a `-mac` suffix to prevent naming conflicts, but see each formula's _Caveats_ section for instructions on how to access these binaries via their original names.
+`brew info gromgit/fuse/XYZ-mac` and read the _Caveats_ section.