Did not do the math myself, but apparently:

https://twitter.com/dominic_w/status/1490349135249035264

"Cost of storing 1 phone photo (3.3MB) on the blockchain"

ICP 1.6 cents - Solana ~$2,500 - Ethereum ~$1M

ICP looks pretty dodgy from some quick googling. The number might still be true, I have no idea...

https://www.reddit.com/r/CryptoCurrency/comments/pg3nuf/was_...

i see pee is actually good at something?

On the order of $1 per KB for Bitcoin IF it allowed transactions to embed arbitrary data, which it doesn't. Spreading bits of data over many transactions is MUCH more expensive.

A fortune. Plus once it's on a public blockchain, everyone can copy it, so not sure what does "only" mean in your question.

I've heard lots of NFTs are just links to links that starts with "https://s3.us-east-1". It makes some sense to make it any ways but not like that.

nah, nowadays they use IPFS

IPFS itself is often just a transient cache of S3 - someone has to host the content somewhere to "pin" it to the IPFS network, that somewhere is often S3.

The ability to store actual assets on the immutable public blockchain probably isn't a very desirable feature, lest some joker uploads something illegal.