[bombcar]

Or to put it another way - the longevity of something on the Internet is the inverse of what you’d want it to be.

[HenryBemis]

I'd phrase it like this - the longevity of something on the internet is correlated with its need/usefulness.

If someone needs that 'thing', they will download & keep a local copy, and then when if it disappears, then someone will ask for it on Reddit and voila! you shall provide.