Given I'm sure many people here have anecdotes about little snippets they wrote in a short amount of time that ended up in use for a decades, even though the code was crappy (someone tell me I'm not alone here...) - I'd be willing to bet something, somewhere will still be around a long time from now.. though a thousand years is a bit hard to comprehend in terms of technological change.

If banks still exist they'll still be emulating zOS on their quantum dimension-folded computers...