I haven't made the leap to a wine fridge yet, so I have a quick storage question. I live in an apartment in an area with relatively mild and stable temperatures (Brentwood in Los Angeles, for reference), and it rarely breaks 80. I have AC (which I rarely use), and the wine is in a wine cabinet as far from the windows and heat sources as possible.
Some of the bottles have been there for pretty close to a year, and are of semi-ageable quality (e.g. a Honig cab). How long can I keep wine in this condition before it turns becomes undrinkable?