They definately need to explain it better, but it's 100 years upfront. and IF the cost of data storage keeps falling, THEN it's forever.
While as Bitcoin in the year 2140 will cease to pay miners.
Discussion
In the year 2140 miners will be paid by transactions fees.
Storing files on Arweave will be more and more expensive. Storing on Blossom is cheaper with time.
Where are you getting this calculation of aweave future storage costs? If I store an image now, in 50 years I avoid paying more. While as inflation rises
Ok, I don't know the future of Arweave. Maybe it will work, maybe not. I hope Arweave will work but I don't know how. As for me it will just die because you can anticipate 5 years of storage cost but infinity years is impossible.