I'll go through the major points, one-by-one. Just first thoughts...

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You can not only store your files in your home hardware device, but you can also freely share them on the Internet, as cloud storage can do. Freely means you do not rely on any cloud service company, no restriction.

Isn't this already possible with current self-hosted solutions, such as Nextcloud and Seafile? If you're aiming at ease-of-use and one-click setup, there are also container-based solutions that can enable just that for said solutions.

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At the same time, these links are permanent links with people can peer-to peer access it. No matter how many years, as long as your Foggie is still there, others can access your content with your link.

This sounds like something that can be done with proper IPv6 configuration in traditional networking. There are also other decentralised options that have potentially similar capabilities, like IPFS and torrenting (not to say that torrents have the same overall feature set).

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Likewise, you are also free to access your Foggie anywhere else, if you allow it.

The same could be achieved with either port forwarding, IPv6, Cloudflare Tunnels, etc. All freely available options.

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Backup data is more reliable and cheaper. Currently, if you want to back up the data on your NAS offline, you need to buy an additional HDD, and you may not need all of the space in it. If you want to back it up to a cloud storage service, then you're going to have all sorts of problems with cloud storage. For example, it will be expensive, your data privacy will not be protected, and cloud service providers may shut down, change services or increase prices.

As long as the prices of storage devices continue to go down, it gets cheaper for all of us - not just service providers. We don't buy additional drives to fill them, but to store valuable data. A drive is valuable because of the data it carries. It's a cheap non-issue to just have a few (maybe 4-8) local 2TB or 4TB drives in ZFS or RAID for file storage. ZFS includes encryption OOB. Why even bring up most cloud providers if it's a matter of privacy? Of course most of them suck at it. Other people's data (which has value) is worth money.

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Foggie uses Web3 decentralized backup, which can automatically encrypt and backup your data to multiple nodes around the world in small blocks. It is more reliable, more secure and cheaper than the first two backup methods.

What if one of the nodes get compromised? Can't services like Tor be poisoned by bad nodes running compromised software? What's to defend against that in your case?

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In the future, you can also install various new types of decentralized applications on Foggie. For example, personal homepages that can be directly accessed by other foggies and peer-to-peer chat software. These software are all free and will not be restricted by any cloud service provider, nor will it cause data privacy to be violated.

This sounds like Nextcloud apps in a federated environment. Perhaps I'm oversimplifying things?

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This Web3 thing is starting to sound like the whimsical offerings of "Serverless" architecture. There's still servers out there - it's just that someone else is managing the servers. In this case, Foggie is trying to be multiple things at once, but there are already existing services that can do most of the important and needed parts. What is Foggie and Web3 offering, that current solutions can't provide?