Filecoin is probably one of the few cryptocurrencies with intrinsic value, even if the amount is debatable. IPFS has stood the test of time and seems like a good protocol; and a cryptocurrency that can be used to pay for storage is not valueless.
Why the torrents didn’t move to IPFS already? I think it looks more like DoA than standing the test of time. From my experience it’s a “heavy tech”/resource hog hog that does not appeal neither to developers nor to end users(it has no killer app)
I think the challenge with torrents is maintaining communities of seeders without getting taken down, but I don't think IPFS really helps with that.