IPFS is still complicated and inefficient because it spews provider records to bazillions of blocks, because they insist on random access to files and chunks.

As far as I know it also still spews your entire wantlist to all peers, which could be hundreds, in hopes that maybe one of them happens to have a popular block you want.

It's also immutable first. So you can't change anything without changing the parent, and so on all the way up the tree, which is fine for some kinds of content but not others.