(Lack of an obvious pronunciation is a good objection, tho.)
To this day I don't know what Eli8 means, and I'm not going to even bother to look it up. It's not communication.
My first guess would have been a username for somebody named Elliot. Given that it occurred in this thread, probably not a correct guess.
I think where we differ is that I see such abbreviations as no worse than any other - TLAs (three letter acronyms) can also be as impenetrable.
It's most pronounced in aye-ate-een-en, internationalization is a word I find myself stumbling when saying in full.
ally?
But yes, like every abbreviation, do use the full word the first time you use it “Considering the topic of internationalisation (i18n)…”
It works ok as long as there’s nobody named Katherine.
I assume the real reason is because each of these indecipherable glyphs is a s8h* to identify the "cool" and "woke" (not in the US politics sense but in a more general sense of the word) crowd from the rest.
* If you don't know this word, you're not in the club