As a really long time Ubuntu Supporter. ( I no longer Support Ubuntu in any way do to Canonical)
i say its time to jump ship on this is one. i moved to Linux Mint (I Love the MATE Desktop) as many users have done. to me it's the only sane move as i use the PPA's Etc. Canonical's Leader Mark has fallen off his wagon this whole Mir Thing and, it really just looks like a Vendor Lock-in and, Us Developers don't need any more fragmentation. Even Kubuntu publicly said they was not going to Use Mir or Xmir but Xorg and Wayland. So Ubuntu 13.10 is not a Sane OS at all i say to 100% stay away from the Android, Microsoft, style OS
MATE Gnome KDE & maybe Xfce are all going to use Wayland
"A few months ago Canonical announced their new graphics system for Ubuntu, Mir. It's a shame the Linux desktop market hasn't taken off as we all hoped at the turn of the millennium and they feel the need to follow a more Apple or Android style of approach making an OS which works in isolation rather than as part of a community development method.
Here at Kubuntu we still want to work as part of the community development, taking the fine software from KDE and other upstreams and putting it on computers worldwide. So when Ubuntu Desktop gets switched to Mir we won't be following. We'll be staying with X on the images for our 13.10 release now in development and the 14.04LTS release next year. After that we hope to switch to Wayland which is what KDE and every other Linux distro hopes to do."
No Driver Support in Ubuntu 13.10
"In 14.04 we will deploy Mir but not provide the X fallback mode, and we are in active discussions with GPU manufacturers for them to support Mir in their drivers." It sounds less likely like NVIDIA and AMD will produce EGL-supported binary blobs compatible with Mir prior to Ubuntu 13.10 but rather ahead of Ubuntu 14.04 LTS next April."
Canonical's public milestones for Mir development
Ubuntu 13.10: Unity 7 with XMir on Mir by default and a fallback session to X
Ubuntu 14.04 LTS: Unity 7 with XMir as default and the fallback session removed. Canonical hopes for full Mir driver support
Ubuntu 14.10: Unity 8 with Mir stack as default, including rootless X support for legacy X applications
Android Microsoft Stylehttp://en.wikipedia.org/wiki/Vendor_lock-in
One of the Best and well known Ubuntu Based OS's even has a Debian Based OS :)http://linuxmint.com/
Ubuntu Based KDE OS not Fallowing Canonical's Developmenthttp://www.kubuntu.org/
Kubuntu says hell no!http://blogs.kde.org/2013/06/26/kubuntu-wont-be-switching-mir-or-xmir
MATE on Wayland Kick ♥♥♥!http://www.phoronix.com/scan.php?page=news_item&px=MTQzMTU
New repositories for openSUSE "On the way to get MATE officially available on OpenSUSE"http://mate-desktop.org/
XMir Has A Big Security Problem With VT Switchinghttp://www.phoronix.com/scan.php?page=news_item&px=MTQ0MjA
Intel Haswell Laptop Impact When Running XMirhttp://www.phoronix.com/scan.php?page=article&item=system76_gazelle_xmir&num=1
The Performance Penalty Of Xfce/Xubuntu On XMirhttp://www.phoronix.com/scan.php?page=news_item&px=MTQyOTY
For Once Gnome will be usable GNOME 3.10 Continues Pushing Ahead With Waylandhttp://www.phoronix.com/scan.php?page=news_item&px=MTQ0MjQ
Mint 15: Today's best Linux desktop (Review) MATE Desktop!http://www.zdnet.com/mint-15-todays-best-linux-desktop-review-7000015691/
Even Using Composite Bypass XMir Takes a 6%-35% hit on Performance on intel drivershttp://www.phoronix.com/scan.php?page=article&item=mir_composite_bypass&num=1
Kubuntu, Lubuntu, and, Xubuntu will not use Xmir in the 13.10 releases (or at all?)
Electronic Frontier Foundation
"It's Not Just Amazon
The new version of Dash that comes with Ubuntu 12.10 introduces more than just Amazon ads. It includes a new legal notice that you can see by clicking the "i" in the corner of Dash that states that by using Dash, you automatically agree to send your search term and IP address to a number of third parties."
"Unless you have opted out, we will also send your keystrokes as a search term to productsearch.ubuntu.com and selected third parties so that we may complement your search results with online search results from such third parties including: Facebook, Twitter, BBC and Amazon. Canonical and these selected third parties will collect your search terms and use them to provide you with search results while using Ubuntu."https://www.eff.org/deeplinks/2012/10/privacy-ubuntu-1210-amazon-ads-and-data-leaks
Major update Sep 8, 2013 Intel takes a stance against Canonical's Mir
Intel Reverts Plans, Will Not Support Ubuntu's XMir
"We do not condone or support Canonical in the course of action they have chosen, and will not carry XMir patches upstream.