Normally I can ignore it, but the font on this blog makes it hard to distinguish where sentences start and end (the period is very small and faint).
It was the norm on irc/icq/aim chats but also, later, as the house style for blogs like hackaday.
Now I read it as one would an hear an accent (such as a New England Maritime accent) that low-key signifies this person has been around the block.
Even more recently is a minor signifier that this text was less likely generated by llm.