A text editor is one thing, and a email text editor is another. Sure, they can be the same, but they don't have to be.
A lot of people (here, especially) will use text editors for a variety of tasks and actually prefer them to the alternatives, whether it is notepad or MS Word. That's we have a DC review of text editors here.
But this is not the same as using the text editor for an email program. In email, 99% of the time, there isn't anything really happening besides regular words and sentences. No programming, no tables, no ascii art. Yeah, you can do this stuff also, but like I said, 99% of the people don't. Maybe some rtf formatting is used once in a while. So, we don't need a full featured text editor for email. Especially if it slows us down.
You just go into an email message, type in a few lines, and send it off. You want this done as quickly and efficiently as possible. The reason why MicroEd is inefficient for me is because you have to always be very precise about where you click the mouse (because of the free caret). It's too much thinking. Sometimes you click at the beginning of the line and you wonder, "Am I really at the beginning of the line?" THen you press "Home" just to make sure. If the free caret wasn't there, you know for sure that the cursor will be at the beginning of the blank line because it can't be anywhere else.
My suggestion for MicroEd--take out the free caret or make it a toggle option. But then I come back to my original question, without the free caret, what's the big deal about MicroEd?