I've been testing a bunch of them lately, and Zettlr (FOSS) has a nice and minimalist thing going on too. I liked Obsidian too, especially the network graph, but the licensing discussions in the other thread yesterday are a bit of a concern, but the dev erica seemed fairly open, so I'm keeping an eye out on how that goes.
So I'm going through a bunch of these apps/systems and so far, Zettlr looks like it might be suited to what you're already doing. It's fairly minimalistic out of the box, the markdown files are automatically named by the date you write them (your daily notes), there's autocompletion for your links, there's tags, and that's it. There are maybe a few other things, but that's it.
I'm trying out Trilium right now because I was interested in its visual mapping (I'm more of a visual thinker So I've been using Freeplane, a mindmap software, but it's too restrictive with the hierarchies) and while it has nice features, there seems to be too much going on, which I suspect won't stick with me personally.
That's pretty impressive, using org-mode and org-roam but lacking in math education, props. I myself have no music education, so I'm using it for that.
I saw Anki integration mentioned recently on the TiddlyWiki boards. TiddlyWiki was also mentioned elsewhere here. It can technically do a lot of the things Obsidian/Roam can with modifications. Stroll and Drift are examples of TiddlyWiki variants. I've been trying them out, there's a bit of a learning curve. Look it up on Google Groups.
[1] https://notes.andymatuschak.org/z4SDCZQeRo4xFEQ8H4qrSqd68ucp...