Reliability of Aged Zin

Here’s one for you: I had an etched magnum of 2001 Kunde Estate Zin and one of their 2001 Merlot I overpaid for at a charity auction many years ago. I thought the etched bottles were kinda interesting and I’d display them, but never did. I didn’t take particular care in storage because I figured I’d never actually drink them…finally decided to get rid of them so in October I opened them up to dump them ahead of the recycling bin. Being the wine geek I am though, I poured a glass of each just to see…
The merlot was gone. Undrinkable. The zin though, really surprised me. There was still some brambly fruit in there, and had a decent finish. It was actually not bad…I finished the glass….and then drank a bit more. Crazy.