I’ve seen this video where GOOGOL gear is depicted (it takes 10100 years on reaching the final gear) but how many generations will it take? The 5th gear takes about 10 hours in real time, by the time the 10th one starts spinning (you’re probably already dead).
The entire thing consists of 100 gears. However, even if you record or livestream a video of the entire thing: would you still be alive by the time the final gear starts spinning? The common life span of a human is around 72-73 median but some can reach 100+ up to 125.
Pretty sure all that would only be true for an ideal, perfectly machined gearbox. In reality, the gears would have some play, which would prevent the motion from reaching the latter gears initially since you first have to “overcome” the play between two gears before the next one gets set in motion