I am a couple of months away from a working mvp of hosted ordered key value stores that don't lock you in.
Discussion
Had a quick look at pkarr ... it overlaps with IPNS?
Also you called IPFS a "fake DHT" as opposed to Bittorrent Mainline. They're both Kademlia?
I didn't call it fake, I may have called it stupid,and it is, this conversation is too late though as Protocol Labs is imploding as they should have years ago, and Mainline will still be here decades from now.
Imploding? This worries me, I'm about to invest some serious brains & time into IPFS. Where can I read more about this.
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Also re. decentralized search: Negatives are hard to prove so I'd be careful with "it's not possible". This here looks promising:
https://www.cs.cornell.edu/~bwong/Cubit/
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Sigh... anyone can make up this stuff, it is impossible, and I will bet money on that.