Yeah... I binged the rest. I took some notes but there wasn't a whole lot that caught my attention as being out of place.
Episode 3: Not an anachronism; quite the opposite. A dead-perfect costuming choice: I had this damn vest. Even the same damn color.

Also, how much did I love the inclusion of
"Go!" by Tones on Tail? I always forget this song is from the 80s.
Episode 4: Pretty sure "romantic comedy" wasn't a term that was used in 1984. I definitely would have remembered that. From what I can find, it wasn't until
When Harry Met Sally was released that the term and the genre became popular again.
Episode 5: No notes taken!
Episode 6: I had flagged the saying "Stay frosty" as suspiciously out of time, but apparently it originated in the military (and we learn that the character who said it served in Vietnam) and also appeared in 1979's
Alien. So never mind on that one!
Episode 7: Was "mouth-breather" used as in insult in 1984? I can't recall hearing it until much later.
The appliances, oh the appliances! The popcorn popper in particular on one character's countertop delivered quite the sense of nostalgia.
And
"Whisper to a Scream (Birds Fly)" by Icicle Works, such a perfect 80s song. One of my favorite from the time.
Episode 8: No notes!
Episode 9: Nothing like anachronism--though the one scene that genuinely made me cry occurred near the end of the episode, not the one I would have expected given everything else that happened in this season. It may be spoilery, so I'll put it behind a cut-tag.
( Possible spoilers. )Anyway. Great season, great homages, and fewer anachronisms than I was expecting.