Down For Maintenance

Every now and then, websites go "down for maintenance". The websites do this for different reasons: improving the quality of the feed, fixing errors on some of the pages, or because the site needed to be updated. But when websites go down for maintenance they prevent anyone from using that site as a resource. I have experienced this many times in my life, and let me tell you, it is NOT fun.
For example, I recently tried to post on this space and it said that I couldn't because the site was down for maintenance for one hour. This was during the school day, so one hour from when I wanted to post I would be in class (most likely), which completely screwed up my posting. You see, I usually forget to post by the time I get home, so I try to do it while I am at school, or when I can remember (I have rediculously bad memory). But if I am not able to post when time permits, the next time I will be able to post might be two days from now. It's difficult to have to work your schedule around the timing of a site's maintenance hours.
Another example was not necessarily with a website, but it was the software on my computer. The software was out of date (what software isn't these days?), and my computer recommended that I update to the newest version. Because it was software I had used before, I decided to download the newest version to my computer. Of course, being the great multitasker that I am, I continued to run other programs such as Firefox, Word, and iTunes. But, once the software had been downloaded, it told me that for the new software to start working I needed to shut off my whole computer. That was very inconvenient, considering I had been researching information and writing a paper. So, I had to save my work, shut down my computer, and finish the process for the new software to take effect.
I understand that it is a necessary part of the updating process and it is beneficial to update software on my computer, but to get it and to be victim to the terms and agreements that come along with the updates is a pain! I wish there was some way that sites could update but not shut themselves down to the public. I also wish that software would automatically update and take effect when the computer turns off and on when it is convenient for the user instead of right in the middle of work. Maybe in a few years engineers or scientists could design computers and programs and sites that actually DO do that.