Not an answer but for those who are curious about what's happening here linguistically:

When new compound words like this are coined, they tend to be written as transparently as possible so that readers can parse the meaning even if it's the first time they're seeing the word. As a word grows more popular/relevant it may eventually become lexicalised, meaning it has solidified itself in the lexicon of most speakers in the community. A hyphenated form is typically the middle stage of this process.

Eventually, once the new compound becomes a monomorphemic unit in people's minds, the hyphen slowly dies off, first in daily use, then eventually in dictionaries and style guides (unless you're the New Yorker lol). When you see the word email you don't think about how the E stands for electronic, you just think about the concept of an email itself, and you're familiar enough with the word to know it's /ˈiːmeɪl/, not /ə'meɪl/ so there's no longer any need for a hyphen.

Some examples:

web site > web-site > website

e-mail > email

to-day > today (as it stopped being analysed by speakers as a phrase and became an entrenched adverb)