At one point during it's usage, words just stop accurately describing what it is, and starts communicating a vibe or something instead. Just like "DOS Games", "MIDI" which is just data in reality, but people started associating it with chiptune, so somehow some people now mix the terms and call chiptune "Midi Music", yet chiptune have nothing to do with MIDI the protocol/.mid the fileformat.
In technical contexts it's often still important to use words accurately so in that sense it might not lose it's original meaning completely. I've come to accept that everyday language can be messy and inaccurate and one can't always get it right especially if they're not familiar enough with the topic. You can still get the meaning across well-enough.
I started playing that at least three times along the years (if for nothing else, then for the dialogue: "You need a rad suit to go in there! -- What do you mean?! This suit is totally rad!"), but somehow never got very far...
something the RFC standard recommend but doesn't require
but it being required is a de-facto industry standard for sending automated mails
and is clearly documented by support sides of large mail providers (like Google)
the mail standards only defines what parts you can put together, but widely fail to define how this parts can be interpreted, what are sensible combinations, etc.
and they don't cover spam/suspicious mail detection at all
so you can't just go by RFC, you need to read up on what all larger mail providers have as additional requirements (which mostly are the same, and Message-Id being the most common dominator) and then hope that another provider you didn't read up one doesn't have some other surprising rule (which doesn't tent to be the case if you don't do anything surprising, but it sucks anyway).
The site should call them PC games.
Okay Boomer...