I wonder how many articles we really should expect to
we'll never be "done". But the largest dictionaries of English list
around 500,000 words.
I would expect us to still be reasonably incomplete even at that; I
think we'll have over a million articles easily. There /should/ be
far more articles than simple English words, because we'll carry at
least an article for each sense of each word, and carry far more
detail than a dictionary. After all, we also cover events, people,
things, movements, etc. Of our present 30,000, for example, there
are about 10 on "chess", 20 on "poker", and 20 on "The
Britannica can get away with a mere 60,000 because many of them are
large and comprehensive, and there are many subjects they don't cover
that we will.