Usecase: I'd like to be able to write a history timeline in simple text, and if I did that in regular Notepad, it would be pure hell to navigate and level the text, if it had more than one line. There are most likely many tools for this, but I want it to be as simple and for as general use as possible, without any "graphical improvements/possibilities". Thank you.
Usecase 2: text style diagrams without pain :D.
edit: usecase 2, text changes.
I tend to use Obsidian these days along with the excalidraw plugin (if you just want to try excalidraw without installing Obsidian: https://excalidraw.com/)
As an "infinite grid", there is https://strlen.com/treesheets/, but it is not exactly geared toward your aim (more like a spreadsheet/outliner combo, or "hierarchical spreadsheet").