10,000 years and he couldn't figure out a way to leave that shythole city
It's actually been heavily inferred by most of the people involved at this point that he was stuck for about 40 years. Still a long fukking time, but 10,000 years was the original script which was far more dramatic. In that script he read one page in a book every day to tell the passage of time, and by the end he'd read the entire public library.
On topic, I need criteria for these kinds of thought experiment. Do I have a definitive end point? Where am I when it begins, what are the parameters of it, what do I retain etc etc.
It's not like back then, we have the internet now, you can spend every day learning and mastering new things so that if it was, say, 40-50 years it would pass I think fairly quickly. Especially given that you're unburdened by responsibility and any sort of attachment beyond your day to day existence. I'd do it.