To clear up the confusion…
You don’t use Tab+N to switch between list and board. It’s not possible to switch between them yet but it’s coming for sure.
What @Marie was referring to was that currently in Asana, sections in lists and sections in boards are two completely different objects behind the scenes. This is what’s preventing Asana from implementing the ability to switch a project between list and board views.
In order to provide the ability to switch views - which they are definitely doing because they know it’s important - they have to convert all list-project sections into board-project sections (that’s a bit of an oversimplification but good enough for this discussion). That is a massive undertaking - remember there are literally millions of Asana users - and quite an involved process under the hood and otherwise.
The Tab+N that Marie was referring to was the fact that before they could even provide the capability to turn list-sections into board-sections, they had to create a standardized way to create sections, and they chose Tab+N.
Rest assured that this whole process of transitioning sections is definitely in motion. You’ll hear more from Asana as the time comes when you can actually convert your account’s list-sections into board-sections; again that’s the first step. Once all list-sections are converted, then Asana will be able to add the ability to switch a project back and forth between list and boards views.
For those who want more gory technical details, you can see this thread: