Remove the sentences about the project being beta

README.md

@@ -23,7 +23,7 @@ pandas is the de facto standard (single-node) DataFrame implementation in Python
  - Be immediately productive with Spark, with no learning curve, if you are already familiar with pandas.
  - Have a single codebase that works both with pandas (tests, smaller datasets) and with Spark (distributed datasets).
 
-This project is currently in beta and is rapidly evolving, with a bi-weekly release cadence. We would love to have you try it and give us feedback, through our [mailing lists](https://groups.google.com/forum/#!forum/koalas-dev) or [GitHub issues](https://github.com/databricks/koalas/issues).
+We would love to have you try it and give us feedback, through our [mailing lists](https://groups.google.com/forum/#!forum/koalas-dev) or [GitHub issues](https://github.com/databricks/koalas/issues).
 
 Try the Koalas 10 minutes tutorial on a live Jupyter notebook [here](https://mybinder.org/v2/gh/databricks/koalas/master?filepath=docs%2Fsource%2Fgetting_started%2F10min.ipynb). The initial launch can take up to several minutes.
 

docs/source/index.rst

@@ -10,7 +10,7 @@ With this package, you can:
 * Be immediately productive with Spark, with no learning curve, if you are already familiar with pandas.
 * Have a single codebase that works both with pandas (tests, smaller datasets) and with Spark (distributed datasets).
 
-This project is currently in beta and is rapidly evolving, with a bi-weekly release cadence. We would love to have you try it and give us feedback,
+We would love to have you try it and give us feedback,
 through our `mailing lists <https://groups.google.com/forum/#!forum/koalas-dev>`_ or `GitHub issues <https://github.com/databricks/koalas/issues>`_.
 Try the Koalas 10 minutes tutorial on a live Jupyter notebook `here <https://mybinder.org/v2/gh/databricks/koalas/master?filepath=docs%2Fsource%2Fgetting_started%2F10min.ipynb>`_.
 The initial launch can take up to several minutes.

docs/source/user_guide/faq.rst

@@ -5,18 +5,19 @@ FAQ
 What's the project's status?
 ----------------------------
 
-This project is currently in beta and is rapidly evolving.
-We plan to do bi-weekly releases at this stage.
-You should expect the following differences:
+Koalas 1.0.0 was released, and it is much more stable now.
+You might still face the following differences:
 
- - some functions may be missing. Please create a GitHub issue if your favorite function is not yet supported. We also document all the functions that are not yet supported in the `missing directory <https://github.com/databricks/koalas/tree/master/databricks/koalas/missing>`_.
+ - Most of pandas-equivalent APIs are implemented but still some may be missing.
+   Please create a GitHub issue if your favorite function is not yet supported.
+   We also document all APIs that are not yet supported in the `missing directory <https://github.com/databricks/koalas/tree/master/databricks/koalas/missing>`_.
 
- - some behavior may be different, in particular in the treatment of nulls: Pandas uses
+ - Some behaviors may be different, in particular in the treatment of nulls: Pandas uses
    Not a Number (NaN) special constants to indicate missing values, while Spark has a
    special flag on each value to indicate missing values. We would love to hear from you
    if you come across any discrepancies
 
- - because Spark is lazy in nature, some operations like creating new columns only get 
+ - Because Spark is lazy in nature, some operations like creating new columns only get
    performed when Spark needs to print or write the dataframe.
 
 Is it Koalas or koalas?