Both the inks and the paper are lasting so long because they are both heavily polyester / plastics based.
The toner you see in laser printers is mostly polyester (85-95%) and silica (+ trace metals to create a charge in the drum).
The "K" cartridge, ie. black is colored by carbon.
Secondly, when you print on this paper, you are actually printing on a three layer material, with the ink being deposited on a thin plastic layer.
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What this all means is you have an extremely stable substrate and non-permeable print.
Frankly, I would be surprised if you witness any fading / flaking in 2030. The only way to really damage these keys are through heat, lasers or direct scratching.
HA! Coming from a true expert on this. Thanks that clarifies lots of things as well for many here.
Next time when back in Manhattan we can talk over dinner! On me of course
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Cheers