[fleddr]

A generic selling platform can go under, delist you, censor you, change terms, get hacked, accidentally lose all content, can change content, they can do (almost) anything.

A NFT is on chain and immutable. Further, they can have smart contracts where artists dictate advanced terms.

So you have more freedom and control in general. As to whether this leads to more monetary success is another question.

[wjohnsto]

What happens if the domain hosting your URL pointer from your NFT disappears?

[fleddr]

Probably IPFS is the best solution right now.

You know, this problem is a lot more generic than many think. There is no such thing as "forever hosting" for a fixed one time cost.