docs: update ARM tutorial

docs/tutorials/arm64.rst

@@ -3,37 +3,10 @@
 Running Tutor on ARM-based systems
 ==================================
 
-Tutor can be used on ARM64 systems, although no official ARM64 docker images are available. If you want to get started quickly, there is `an unofficial  community-maintained ARM64 plugin <https://github.com/open-craft/tutor-contrib-arm64>`_ which will set the required settings for you and which includes unofficial docker images. If you prefer not to use an unofficial plugin, you can follow this tutorial.
+Tutor can be used on ARM64 systems, and official ARM64 docker images are available starting from Tutor v16.
 
-.. note:: There are generally two ways to run Tutor on an ARM system - using emulation (via qemu or Rosetta 2) to run x86_64 images or running native ARM images. Since emulation can be noticeably slower (typically 20-100% slower depending on the emulation method), this tutorial aims to use native images where possible.
+For older versions of Tutor (v14 or v15), there are several options:
 
-Building the images
--------------------
-
-Although there are no official ARM64 images, Tutor makes it easy to build the images yourself.
-
-Start by :ref:`installing <install>` Tutor and its dependencies (e.g. Docker) onto your system.
-
-.. note:: For Open edX developers, if you want to use the :ref:`nightly <nightly>` version of Tutor to "run master", install Tutor using git and check out the ``nightly`` branch of Tutor at this point. See the :ref:`nightly documentation <nightly>` for details.
-
-Next, configure Tutor::
-
-    tutor config save --interactive
-
-Go through the configuration process, answering each question.
-
-Then, build the "openedx" and "permissions" images::
-
-    tutor images build openedx permissions
-
-If you want to use Tutor as an Open edX development environment, you should also build the development image::
-
-    tutor images build openedx-dev # this will be automatically done by `tutor dev launch`
-
-From this point on, use Tutor as normal. For example, start Open edX and run migrations with::
-
-    tutor local launch
-
-Or for a development environment::
-
-    tutor dev launch
+* Use emulation (via qemu or Rosetta 2) to run x86_64 images. Just make sure your installation of Docker supports emulation and use Tutor as normal. This may be 20%-100% slower than native images, depending on the emulation method.
+* Use the `unofficial community-maintained ARM64 plugin <https://github.com/open-craft/tutor-contrib-arm64>`_ which will set the required settings for you and which includes unofficial docker images.
+* Build your own ARM64 images, e.g. using ``tutor images build openedx permissions`` and/or ``tutor images build openedx-dev`` before launching the LMS.