improve alternative autodiff approaches

Author: ZuseZ4

src/ecosystem.md

@@ -2,20 +2,20 @@
 
 Enzyme started as a PhD project of William Moses and Valentin Churavy, that was able to differentiate the LLVM-IR generated by a subset of C and Julia. It has since been extended by frontends for additional languages. Enzyme is an LLVM Incubator projects and intends to ask for upstreaming later in 2024.
 
-## Enzyme frontends
+## Development of a Rust-Enzyme frontend
 
 We hope that as part of the nightly releases Rust-Enzyme can mature relatively fast because:
 
 1) Unlike Enzyme.jl, Rust won't encounter bugs based on Garbage Collection, JIT, or Type Unstable code.
 2) Unlike Clang, we do ship the source code for the standard library. On the Rust side, we therefore don't need to manually add support for functions like [`_ZSt18_Rb_tree_decrementPKSt18_Rb_tree_node_base`](https://github.com/EnzymeAD/Enzyme/pull/764/files#diff-33703e707eb3c80e460e135bec72264fd2380201070a2959c6755bb26c72a504R190).
-3) Minimizing Rust code is reasonably nice and Cargo makes it easy to reproduce bugs.
+3) Minimizing Rust code is reasonably nice and Cargo/crates.io makes it easy to reproduce bugs.
 
 
 ## Non-alternatives
 
 The key aspect for the performance of our solution is that AD is performed after compiler optimizations have been applied 
 (and is able to run additional optimizations). This observation is mostly language independent and motivated in the 
-first Enzyme paper (covering C/C++/Julia), and also mentioned towards the end of this java autodiff [case-study](https://github.com/openjdk/babylon-docs/blob/master/site/articles/auto-diff.md).  
+first Enzyme paper (covering C/C++/Julia), and also mentioned towards the end of this non-Enzyme java autodiff [case-study](https://github.com/openjdk/babylon-docs/blob/master/site/articles/auto-diff.md).  
 
 ### Wrapping cargo instead of modifying rustc