Use case or problem
The major use case here is to be able to put images or tables side by side for use in slides and for direct note export to PDF (as opposed to export via pandoc).
The recommended method for doing this is to put images within the <split></split> tags, but then these do not actually render side-by-side - unless you embed them and look at an embedded version.
(Scaling is obivously also important)
I spelt out the details of the problem in this bug report.
At the moment Obsidian behaves inconsistently in embedded and native mode.
Proposed solution
Ideally, one would alter the obsidian rendering engine to behave the same whether embedded or not, and choose the embedded option. However, I can see that there might be backwards incompatibility issues if one simply changed the behaviour, so a possible solution would be to either only do this for the one tag: split, or better and more future proof, to parse such tags and look for an optional attribute like “render-markdown=True” and respect that (or not) in both native notes and embedded notes.
Current workaround (optional)
I’m using multiple layers of embeds and/or just not doing it, and it’s only ok for very simple presentations. It’s quite a blocker for using the same notes for presentations and for notes and reports.