(...)So, what's the point of investing in NFTs if they can disappear in an instant? Unless all of the content is stored on the Blockchain itself, I don't see how NFTs will be able to last forever. Are there already solutions in the works that I'm not aware of? Please enlighten me on this. Your input will be greatly appreciated. Thank you. 
I can understand the problem OP mentioned, as I myself am a user in NFT environment, indeed this is a problem for which there is currently no perfect solution to this problem. However, there are a few improvements and solutions that can help reduce the risk of NFT loss due to centralized server failure. However the way I see the solution from using IPFS, it can be said that using IPFS can help reduce the risk of centralized storage in a single place, using this protocol also allows stores data on multiple servers, which minimizes the risk of data loss.Although there is no perfect solution yet, using the above solutions can help minimize the possibility of NFT loss. With the development of distributed and decentralized storage technologies, we can expect many new solutions to be developed in the future to help protect and store NFT in a sustainable and secure way than.