Update features.md

Author: yoav-lavi

src/doc/src/reference/features.md

@@ -514,8 +514,8 @@ source and inspect it.
 [`cargo vendor`]: ../commands/cargo-vendor.md
 [cargo-clone-crate]: https://crates.io/crates/cargo-clone-crate
 
-### Caveats
+### Feature combinations
 
-Features, which are a form of conditional compilation, require an exponential number of configurations and test cases to be 100% covered. By default, testing, linting, Miri, docs and others will only run on the default set of features.
+Because features are a form of conditional compilation, they require an exponential number of configurations and test cases to be 100% covered. By default, tests, docs, and other tooling such as [Clippy](https://github.com/rust-lang/rust-clippy) will only run with the default set of features.
 
-There are certain tools like [cargo-hack](https://github.com/taiki-e/cargo-hack) and [cargo-all-features](https://github.com/frewsxcv/cargo-all-features) that allow you to test all combinations of features which can help reduce the amount of configuraton needed.
+We encourage you to consider your strategy and tooling in regards to different feature combinations - Every project will have different requirements in conjunction with time, resources, and the cost-benefit of covering specific scenarios. Common configurations may be with / without default features, specific combinations of features, or all combinations of features.