Yes, Steemit is based on a decentralized blockchain. I like Substack for its reach and business support. The community is solid. I’m not sure if those points make it unique enough, but I like it.
Discussion
Here’s one you might know about:
https://open.substack.com/pub/bitcoinarchive?r=7f2r9&utm_medium=ios
From just a UI perspective, it doesn't look like #Steemit has changed at all since I joined in 2018.
What was useful was finding that I can copy / paste my article from the https://Highlighter.com WYSIWYG editor and it maintained the markdown styling for Steemit, but Steemit is still a very basic editor.
My hope is that I can reach an audience through #Substack, whilst also testing and using clients like nostr:npub1w0rthyjyp2f5gful0gm2500pwyxfrx93a85289xdz0sd6hyef33sh2cu4x on #nostr and then make an argument for the benefits of nostr as more and more people start to embrace the #bitcoin economy.