I use Ubuntu as my exclusive desktop OS.<p>Ubuntu / Linux has far bigger problems than Unity. (Jump to point 5 for conclusion).<p>1. There are huge regressions.<p>With the upgrade to 11.10 my laptop's battery life has been cut from 5-6 hours to 2-2.5 hours. This is on an Asus UL machine that on Windows gets 10 hours.<p>This may be a kernel issue, but Canonical could add a lot of value by at least warning, or better, fixing/minimizing the problem. There are all kinds of boot parameter hacks, etc. to try to fix this, but it requires a lot of reboots and fiddling with internals. How about including a script to optimize these settings that is run after the upgrade?<p>"Linux on the desktop" is a dangerous misnomer, because on desktop computers power is not a concern. But nowadays power consumption is almost everything. Canonical already has its sights set on mobile devices, but hasn't even addressed power consumption for notebooks properly.<p>2. Poor communication of core functionality changes<p>New additions are presented and lauded in glossy detail, but removed features are not as clearly presented.<p>Nautilus (file manager) used to allow drag and drop copying/moving of files onto the left pane "bookmarks" folders. This was simply removed without warning, crippling quick drag and drop filing. Once again, this is "upstream", because of the Gnome/Nautilus teams' decisions, but it affects users in a noticeable way.<p>The initial update to Unity (11.04) removed all gnome applets, and made the time tracking software I used to use inaccessible. The upgrade to 11.10 made me lose my skype app/status indicator.<p>I don't care if my dock is on the left or bottom, or my open-close buttons are on the left or the right. Most of Unity's "coolness" is Compiz anyway - zoom, desktop switching, etc., so all that was available before Unity. For launching applications, gnome-do is still much faster, light-weight, and flexible (e.g. allowing creating/opening individual tomboy notes).<p>By communicating feature additions and subtractions better, people won't be so negatively surprised. Set proper expectations.<p>3. Key consumer software weaknesses<p>No good media creation suite. I was trying to make a photo slide show with a soundtrack a while ago, and I went through two days of installing/testing, setting up ppa's, compiling sources, etc. to get the latest versions, and nothing really works well. I mostly code, write, and use the web, so it's not mission-critical for me, but for a "consumer desktop OS", the absence of an official and well-functioning suite of applications akin to Apple's music and movie makers is a weakness.<p>Other apps like Evernote and a more up-to-date Skype would be nice as well.<p>4. What hardware does it run on flawlessly?<p>When you buy a computer with Windows or OS X, you know that everything will work. With Ubuntu/Linux, you don't. It's a huge stress factor before buying a new computer. Ubuntu has "certified hardware", but it's buried on some wiki page or other back page. This information should be front and center on the home page, so that I can buy something with confidence that it just works.<p>5. Conclusion<p>Ubuntu (whether Unity or Gnome) is far more usable than Windows (messy config menus, no multiple desktops, no full-screen desktop zoom, inconsistent shortcuts, etc.), and at least as good as OS X (which for example doesn't allow you to change the system's font size globally, and is less keyboard navigation friendly).<p>I'm considering abandoning Ubuntu again, because it can't compete on power consumption.<p>I am sympathetic to Canonical being annoyed by the bitchy entitlement complaints over superficial UI features (e.g., open/close buttons left or right). It's bike-shedding to the max.<p>That said, I think better up-front communication of changes can help set expectations. It forces the designers to reason why they are removing/changing/adding something. This doesn't have to lead to drawn out discussions, but some design decisions seem to be "shot from the hip" without realizing that they may affect/ruin thousands of people's work flow.<p>Lastly, there are huge issues like power consumption and predictable hardware compatibility that currently heavily weigh against Ubuntu/Linux.