Drupal8 site status - "unsupported release" / "not supported" is this deliberate? Is this a deliberate message as drupal8 is not yet the latest production release?

The reason for raising this question is that it was unexpected in my opinion to see this. I would not have expected to see messages about unsupported / not supported - after all, Drupal 8 is being very actively developed, so to my mind it IS supported. Maybe it depends on the point of view - i.e. for production, then no, not yet. Please advise, thanks!

(see screenshot below)



Tried searching issue list for drupal 8 on drupal.org a few times but blank screen - perhaps volume of issues and peak time may be causing the results to not be displayed. Haven't raised this as an issue because it may be something I've not done right in the setup.

Wondering if it might be related to this problem (which appears to be just a warning, though): 

$ drush up
The external command could not be executed due to an application error. 

(Discussed here: Error when updating modules with Drush )

My system setup


Running on a puphpet.com configured VM, Ubuntu 12.04 LTS 64bit
PHP 5.5.12-2+deb.sury.org~precise+1 (cli) (built: May 12 2014 13:46:35)
mysql  Ver 14.14 Distrib 5.5.37, for debian-linux-gnu (x86_64) using readline 6.2
Drush Version   :  7.0-dev


Obtained drupal8 doing the following:

$ git clone --branch 8.x http://git.drupal.org/project/drupal.git drupal8.localvm
Cloning into 'drupal8.localvm'...

and then

$ git pull
Already up-to-date.
That was probably a warning in Alpha. We're now at Beta 7, and it's now yellow instead of red:
There are currently 55 critical issues remaining:
https://www.drupal.org/project/issues/drupal?priorities=400&amp;version=8.x
Which still gives a nice trend line toward 0, and release candidates:
https://plot.ly/~xjm/37/remaining-critical-issues-during-the-drupal-8-beta/