[marginalia_nu]

Some fairly hefty books have been written with a pen. Consider something like The City of God, or The Enneads, or the Essais of Montaigne.

If anything, I think they were better for it. A slow writing medium means a lot more thought went into each page. Nobody in their right mind would spend hours arduously writing a buzzfeed listicle with a goose feather, such low-effort writing is only possible when writing is effortless. The fact that effort went into the actual writing usually means that effort also went into considering what was to be written.

[romwell]

My point wasn't that any writing tool is better than the other; I was expanding in the GP comment's observation that it very much does affect writing (as you also seem to agree).

And my remark was specifically that I wouldn't find it enjoyable to write that long comment with a pen. Maybe it'd be better for it, maybe worse, maybe I'd go and play piano instead; the point is, it'd be very different.