I really like Trilium Notes as a Joplin/Obsidian alternative!
I don't know if this really is as harmful an enshiftification as we've come to expect from other projects, it mainly seems to be allowing you to have a "patreon" or "gumroad" type project tied to your actual community. There's an argument that the centralization is harmful in the long run when everything goes belly-up but this move in a vacuum seems like a logical next step for Discord itself