Merge pull request #1241 from eed3si9n/wip/changes

Update the changes page

src/reference/changes/sbt-2.0-change-summary.md

@@ -7,10 +7,25 @@ While the general concept translates to sbt 1.x,
 details of both 2.x and this doc are subject to change.
 ```
 
+Changes with compatibility implications
+---------------------------------------
+
+See also [Migrating from sbt 1.x](./migrating-from-sbt-1.x.md).
+
 - sbt 2.x uses Scala 3.x for build definitions and plugins (Both sbt 1.x and 2.x are capable of building Scala 2.x and 3.x) by [@eed3si9n][@eed3si9n], [@adpi2][@adpi2], and others.
 - Bare settings are added to all subprojects, as opposed to just the root subproject, and thus replacing the role that `ThisBuild` has played. by [@eed3si9n][@eed3si9n] in [#6746][6746]
 - `test` task is changed to be incremental test that can cache test results. Use `testFull` for full test by [@eed3si9n][@eed3si9n] in [#7686][7686] 
+- sbt 2.x plugins are published with `_sbt2_3` suffix by [@eed3si9n][@eed3si9n] in [#7671][7671]
 - sbt 2.x adds `platform` setting so `ModuleID`'s `%%` operator can cross build on JVM as well as JS and Native, as opposed to `%%%` operator that was created in a plugin to workaround this issue. by [@eed3si9n][@eed3si9n] in [#6746][6746]
+
+### Dropped dreprecations
+
+- sbt 0.13 style shell syntax by [@eed3si9n][@eed3si9n] in [#7700][7700]
+
+Features
+--------
+
+- Project matrix, which was available via plugin in sbt 1.x, is in-sourced.
 - Local/remote hybrid cache system. sbt 2.x implements cached task, which can automatically cache the task results to local disk and Bazel-compatible remote cache. by [@eed3si9n][@eed3si9n] in [#7464][7464] / [#7525][7525]
 
 Previously on sbt
@@ -23,6 +38,8 @@ See also:
   [6746]: https://github.com/sbt/sbt/pull/6746
   [7464]: https://github.com/sbt/sbt/pull/7464
   [7525]: https://github.com/sbt/sbt/pull/7525
+  [7671]: https://github.com/sbt/sbt/pull/7671
   [7686]: https://github.com/sbt/sbt/pull/7686
+  [7700]: https://github.com/sbt/sbt/pull/7700
   [@eed3si9n]: https://github.com/eed3si9n
   [@adpi2]: https://github.com/adpi2