I recognise that quote. :) But am I right in noticing a lack of breathings? Unless the tilde indicates it. I'm not sure of the difference between the acutes and graves here. I am used to seeing only one kind of accent on ancient Greek vowels.

The breathing marks are clear in the Ancient Library texts (e.g. St John's Gospel), but difficult to make out on Hacker News.

A propos of breathing marks, iota subscripts, and the three different accent marks of Classical Greek, when I learned it at school we had to remember the breathing marks and iota subscripts, and would lose marks if we omitted them, but we didn't need to learn the accents. Modern Greek now has only (acute) accents, which you need to know to stress the correct vowels, exactly where the accents were in the equivalent Classical Greek words.

There are in fact rough breathing marks there on the articles, stacked under the inverted breve accents. Which is an alternate form of tilde.

Could vary by text? I see breathing marks in Homer.

Modern editions usually use modernized spellings. There are no breathing marks in the oldest manuscripts; they are a classical innovation (circa 400 BC) several centuries after Homer was first written down (600 BC or earlier). Though most of Homer as we receive it today is through medieval manuscript copies, and copyists often "corrected" the spellings just like we do today.