Composing plain text messages in fixed width fonts

A pet peeve of mine:

Many people don't know how easy and convenient it is to compose messages in plain text with a fixed-width font. Apparently, the people who wrote the google mail application don't, either. So, here are my reasons:

1. Better keyboard feedback - each character I type moves the cursor ahead by a good amount, whether it's a narrow character like a comma or a wide character like a "w". You can type faster this way.

2. Ability to quickly format a short table or list in the message without using the mouse. Not having to use the mouse helps you type faster.

3. Plain text messages are easy for people on diverse mail systems to read exactly the way they are formatted, since they are usually presented with fixed width fonts.

4. Plain text is a simple, elegant, and efficient way to communicate -- smallest size per content.

It should be very easy to add this option to gmail. But when I had asked this question a few years ago by sending email to google help, I never got any replies or acknowledgement. Lack of this basic feature is the reason I don't use gmail as much as I otherwise would.

Come on, Google Mail team. We're not asking for much.