You're not paying for storage. You're paying for permanent, guaranteed immutable, community-programmable storage immune to seizures, platform changes, manipulation, and censorship.

For the right use cases, that's a bargain.

It is only immutable and immune to manipulation while there are enough miners, and there are no hard forks.

While it may look good now, there is a non-zero chance it will disappear within 5 years for some reason or other.

So if your data is really important, better make a backup copy of it somewhere safe, like in B2.