Looking at prior experience, there are three categories of users:
- Those coming from code editors and historic markdown editors
- Those coming from word processors - or requiring very easy interaction with word processor files;
- Those coming from other PKM programs.
(coming from probably includes still using)
The first uses current Obsidian behaviour, the last two use Enter, Shift-Enter.
Live Preview is based on the interests of the last two groups (most of the first preferring the old two-pane approach).
I believe Obsidian, especially Live Preview, has most in common with the last two groups, too. It isn’t even able to behave as a traditional markdown editor where you could open any markdown (often including .txt and a number of markdown extensions). So it makes sense for it to be able to behave in the same way as other PKM programs.
I have only suggested the change as an option.
And, since we agree on that, the only question is what should be default.
I appreciate the logic of the suggestion made above that it should be default only in Live Preview (though I think it would be less confusing for Obsidian to maintain the same default across all editors).
I compared the three groups of users and asked myself which would find it easier to find and use the toggle. I had no doubts in my mind that it would be the first, so I recommended the default be changed.