In my feedback I’m defining things this way:
- Items - Individual block types in a list.
- Sections - Groupings of Items with a semantic title
- Tabs - Recent, Blocks, Embeds
Ultimately… I think the editor navigation would make more sense with a “rule” that tabs move you from “unit” to “unit”, and arrows move you within (and between, if they are nested) sections/units. It gives the interaction more of a consistent rule and I feel like it would help because people are transitioning between mental states if they’re perusing a list of Items vs jumping from Recent to Embed, for example.