In Noah’s times a lifespan was measured in hundreds of years.
They were indeed. Methuselah lived, if I recall, 969 years. That’s a ton of years. I wonder what these people did, to occupy their time, on a daily basis for 900 years? We do not, however, know what kind of technology, those fallen angels (sons of God) gave to Genesis man. We simply don’t know.
I would guess, they might have been doing things that we could only dream about. Did they have aircraft? Who knows, but these people were not stupid. They didn’t live in caves. They built great cities. Who knows what else they did?