YSK alternatives to imgur for uploading your images
LollerCorleone@kbin.social to 
Imgur now blocks several VPNs and have issues loading embedded previews in several fediverse platforms. So instead of using imgur, you could use one of the following alternatives for uploading your images.
https://postimages.org/
https://imgbox.com/
https://imgbb.com/
https://www.imagebam.com/
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IPFS (or similar tech) is the only sustainable solution for media hosting on federated platforms.
Permanence is important - old posts with dead media links is bad for society IMO - but we can't expect volunteer instance admins to be held responsible for something as complex and expensive as permanent media hosting.
While somewhat correct it still needs someone hosting your data, even if it's you.
Slightly off-topic:
I never get why Ipfs is using these false claims about "uploading" to the Ipfs and having it "permanently" stored. In reality it's just Torrent, someone has to have the file - if no one has, there is no file. In theory one could make the same file available again in the future but all the hashing settings have to match with the previous or you'll get a different reference hash.
The hardest part will always be moderation. It will be incredibly difficult to prevent smut and CSAM propagating without people actively monitoring what content is being hosted. But even if you assume random people have the time and are ok with seeing and reporting/filtering out that content, you'll still never combat advanced cryptographic steganography techniques; a picture of a flower might have content hidden inside it somehow that encodes the bad content in a way that you'll never find it. On top of that, moderation is work that no one wants to do for random content they don't care about, but without people hosting content they don't care about, links will die too quickly to be useful. Imagine if you posted an image to a niche community, and then had to keep your system on for hours, days, or weeks, ready to seed it to the one lurker who happens across it, and then maybe they also seed it.
tl;dr it's a very difficult problem...but honestly maybe AI breakthroughs can help with it