If we do not count the permanent redirects in the Articles section, nimesh
is right with 414 articles.
asked about articles and not threads. So .. I just added the counts shown below the page. For example, the C++ sub-section shows :
Note that the page says showing XXX articles
out of XXX.
So, the total number of articles this way is : 178 + 5 + 58 + 47 + 35 + 38 + 46 + 16 = 423.
Don't know which one will be accepted. But, I thought I should try