This week I learned that Obsidian has deep links.

When linking to another page, you can type a "^".

The autocomplete drop down will then show you all of the paragraphs in that other file.

When you pick one, it will add a deep link anchor to the end of that line, e.g. "^ac3b".

The anchor is small and unobtrusive; if you edit the text around it (like copy/pasting) it's clear to include it or exclude it.

This is an elegant system that naturally keeps deep links working even as they move around a file without littering the file with lots of anchors.