update some verbiage in the readme

README.md

@@ -11,28 +11,24 @@ This project was primarily borne out of curiosity and a desire to learn. If it p
 
 ### License
 
-Licensed under [MIT license](LICENSE).
+Available for use and distribution under the [MIT license](LICENSE).
 
 ### Known limitations
 
-There are many gaps in compatibility; most notably:
+There's a lot that *is* working, but also non-trivial gaps in compatibility. Most notably:
 
-* Commands run asynchronously as jobs, job management
-* Honoring `set` options (e.g., `set -e`)
-* Input/output redirection for subshells and function definitions
+* **Commands run asynchronously as jobs, job management.**
+  You can run `some-command &` but it's proof-of-concept quality at best. Standard job management via `fg`, `bg`, and `jobs` is not fully implemented. This would be a great area for enthusiastic contributors to dive in :).
+* **Honoring `set` options (e.g., `set -e`).**
+  The `set` builtin is implemented, as is `set -x` and a few other options, but most of the behaviors aren't there. `set -e`, for example, will execute but its semantics aren't applied across execution.
 
-Shell built-ins are a mixed bag. Some are completely implemented
-(e.g. echo), some only support their most commonly used options,
-and others aren't implemented at all.
+Shell built-ins are a mixed bag. Some are completely and fully implemented (e.g. echo), while some only support their most commonly used options. Some aren't implemented at all.
+
+There's certainly more gaps; with time we'll find a way to represent the gaps in some understandable way.
 
 ## Testing strategy
 
-This project is primarily tested by comparing its
-behavior with other existing shells, leveraging the latter
-as test oracles. The integration tests implemented in this
-repo include a few hundred test cases run on both this
-shell and an oracle, comparing standard output and exit
-codes.
+This project is primarily tested by comparing its behavior with other existing shells, leveraging the latter as test oracles. The integration tests implemented in this repo include a few hundred test cases run on both this shell and an oracle, comparing standard output and exit codes.
 
 ## Links: other shell implementations