For consistency, there should be a 'Visit meta' link at the top left on SO. Every other sites' meta link is up there, SO shouldn't be left out!
What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
I can think of one reason not to, in this post Jeff explains that
Who is the parent to
That being said I'm not against having a link.
A meta site has been created for SU and SF, which so far have been discussed in meta. I think it would be only consequent to use meta.stackoverflow.com for SO. But I agree that then meta would have to be moved, because there has to be a place to discuss both the SE software as a whole as the special sites like Area51 and Careers.
I would argue whether StackApps could be treated like any other SE site with its own meta. There eventually will be tons of apps being discussed, such that it would allow for its own venue.
Now, the natural place to move meta to would be meta.stackexchange.com. But this is taken by all existing old SE sites as their meta. And them having their own implementation/branch of SE it would not be easy to change that, I guess.
As I like things in order, I would make these sites:
or wait until meta.stackexchange.com is cleared and reuse it.
The "feedback always welcome" link in the footer of SO pages links to meta. There are also several other sites where the same is observed: Stack Apps, Area 51, and Careers. Since Meta SO is used to discuss so many different sites, not placing the link in the upper-left may be a tactic to help keep noise down.