Interleaf is based on the formatting process.
I had almost rewritten all of the display code for windows, and that was when I gave up.
I wish we hadn't used all the keys on the keyboard.
The point is that you want to have a system that is responsive.
Interleaf is very nice. I expect there to be a lot of competition for programs like that.
Most of the bright people don't work for you - no matter who you are.