Re: Neat features in Eclipse editor

[Richard Stallman]

    Imagine several Emacs frames that are laid out next to each other, for
    instance like this:

    +---+-------------+
    | 1 | 2           |
    |   |             |
    |   |             |
    +---+-------------+
    | 3               |
    +-----------------+

Ok, but why can't 1, 2 and 3 be windows?
That would be a much simpler change than adding a new
kind of entity.

What usage scenario makes it necessary for these to be more
than single windows?

I am not saying there isn't one.  I'm asking to look the intended
usage in order to see which solutions are adequate.