Semilattice looks pretty nice. Out of curiosity, did you ever look at Trilium Notes?
Here is the closest thing to a overview I could find. I posted it earlier in the thread. When searching for more info about semilattice, I stumbled upon Trillium again. This seems to be the way of things. Not only do you discover new things, but you rediscover things. I wonder how deeply you looked at it. It looks like there are a number of ways to handle note titles.
But I think what makes it a really powerful option is the scripting.
https://github.com/z...trilium/wiki/ScriptsAdvanced demonstrations of what can be done with the scripting gets me thinking about how this could be used.
It also appears to have some to integrate with mobile.
Trilium Sender also you to write/send notes to your day note. (though I am not sure if this has been updated)
I have had little time to really explore but when I left off, I was seriously considering trying Trilium with the aim of hosting my own. Hosted web version is a full app for both desktop and mobile and also acts as a central sync server for desktop clients. There also a front end for touch based devices which.
I am not sure if you you explored it or were put off by something. There has been alot of exploration on this thread (and I have not kept up) I have not had a chance to look at obsidian, but I think I glean how it works by what people have posted and also doing some playing around with roamresearch. In the end, what I would like is something that really allows for the same "play" as actual index cards. Having a system freely showcases the inherent connections between pieces of information is really attractive. I think Roamresearch and Obsidian are getting closer to that.