Well, the point is that just shrinking stuff that looks pretty good isn't professional typesetting. Attention to stroke size in small-caps fonts are exactly the difference between a professional system (or just a professional typesetter) and using MS Word. It's not out of the question to build a JS-based system to do this kind of thing, but it would be a great deal of work, with probably little payout. After all, Knuth and crew have been doing the work and the upkeep on TeX and LaTeX for what, twenty or thirty years now?
I just checked your Naphthalene pdf. Looking at the first page of text (page 1):
* The first real kerning issue is the third word "wondering", which looks like "wo n d erin g" to me. The kerning is terrible, but that is probably more of a font issue.
* There should be no line break between the words: >>overpowering circumstance?”<< Probably should hyphenate circum-stance.
The kerning issue is due to an existing bug with PhantomJS on Linux [1]. Hyphenation is a feature I've been wanting to do for a while but haven't managed yet due to the lack of a decent hyphenation engine for JS [2].
To quote from the readme, the program is "a very early version with a number of problems". But my point of "it's finicky but possible" still stands.
