I actually like the reduced width because of the way I arrange edit panes, and after a brief adjustment period, have no readability issues at the font sizes I typically use. That's a personal taste thing, though, so I can see that others wouldn't like it. The 'm' glyph is a useful bellwether/canary in that it becomes difficult to distinguish the legs before most other glyphs become problematic. I tend to adjust the font size to one level above where the m's start turning into bricks, and have no readability issues, and still ample horizontal space. I don't generally use the font for publication to others (although I'm experimenting with its use in code blocks). I do often use it in projecting demonstrations to students, although that's typically at a large font size, when the legibility isn't much of an issue, but the narrowness is an asset.