An additional affordance of <Y> is that it may be the first known example of an ‘action‘ word, i.e. a verb (‘to give birth’), although we acknowledge that this is ambiguous: it could function as a noun, ‘birth’, or ‘place of birth’.

this has nothing to do with verbification, or "verbing."

"you can verb any noun". :) Though, comparing "ssh into a workstation" to "login to host.com", where "log in" exists, it's a bit like saying "entrance the building" when "enter the building" already works

Under such a scheme, even if an attacker makes a malicious proposal, voters have the ability to respond and shut it down.

Giants that prefer the hyphenated spelling—Merriam-Webster, The Chicago Manual of Style, and The New Yorker, have a good reason for doing so. E-mail is a compound noun, made out of two words—“electronic” and “mail.” The e in e-mail is an abbreviation for “electronic,” and it’s used in a lot of other words as well—e-commerce, e-learning, and e-business, for example. There are also other compound nouns formed from an abbreviation and a noun, like the H-bomb, which is short for hydrogen bomb. The general rule of hyphenation in compound words that combine a single letter (or a number) and a word is to hyphenate them. So, based on tradition, e-mail is the correct way to do it.

For the actual name of the thing, I like behaviors more than enhancers. That might be too limiting but I can't think of using this for styles or something that I wouldn't call a behavior. traits is also nice. Hey, decorators works too.

English tends to build new compound nouns by simply writing them as separate words with a blank. Once the compound is established (and the original parts somewhat "forgotten"), it's often written as one word or hyphenated. (Examples: shoelaces, aircraft...)

Web site / website seems to be somewhat in a transitional stage, being seen as an "entity" that web page hasn't reached yet. Depending on which dictionary you check you will find web site and website, but only web page, not webpage.

Other languages, German for example, are notorious for very long compunds like this and this, that are made up and written as one word directly. Perhaps the way your native language deals with compounds explains your (or other authors') personal preference and sense of "right"?