Okay, I've been railing on for awhile about how bad it is when articles get deleted. It doesn't focus energy on more "serious" articles; instead, it frustrates people, drives them away, and has a chilling effect on the whole project.
The irony, of course, is that "deletion" is the wrong word -- the article's just hidden.
The obvious solution is to move the "deleted" article somewhere off-wiki. It's a shiny happy utopian obama-like solution because it resurrects the thousand-flowers-bloom spirit wikipedia once had, where every action seemed somewhat focused on building an awesome body of work that anyone could enjoy.
Four things prevent it from happening, though:
1. Inclusionists fear wikipedia will lose even more articles because they won't be able to argue "if you delete this, nobody will see it".
This is a bad strategy! It forces people to choose between two opposites (delete or keep); "delete" will eventually win, and that will be that. Plus, it's wrong on principle because it impoverishes the conceptual space and constrains what's possible.
2. There's nowhere else like wikipedia.
Telling someone to move from Wikipedia to Everything2 is like kicking your friend off your living room couch because "I think there's a pillow or something in that alley".
This will only be solved when other places get more vibrant. The more articles are moved, the faster that happens.
3. The interface between wikipedia and the rest of the web is really bad. To put it another way:
(a) There's no easy or automatic way to move an article off-wiki because you've got to move its whole history to preserve the authorship record.
(b) Once the article's been moved, it leaves no trace. The deleted wikipedia article is an ordinary blank page, with no indication that the content is still there, potentially a click away.
4. Over-caution. The best place to move things is Wikia, which is a commercial wiki farm that for all sorts of reasons (taxes, culture, brandt) can't be seen as an appendage of the non-profit wikipedia; it has to be walled off, like the church and state. This adds some friction to the export process and generally makes people shy away from working on it.
The fix is obvious enough: always provide a bunch of different links (to wikia, bluwiki, and wherever else). It would help if other wiki providers knew their shit as well as wikia.
Anyway, the main point is that all of these problems are solvable. There aren't any insurmountable obstacles.