what is the most "above your station" thing you have ever experienced?
My wife and I make okay money in a middle class area, but, due to a combination of good luck, and contrived to circumstances, we recently got to watch a college football game in the stadium's super executive corporate sponsor level suite. It was awesome. Open bar, amazing catered food, and people networking all around me who are clearly in the c-suite of their respective companies. I had a list of crazy things I was going to say if someone asked me what I did, but it never came up.
These days I almost always buy that upgrade. I'm not tall or anything but for $50-100 extra it makes the flight so much more tolerable. That's easy money on top of a $3000 vacation in my book.
You bought coach, business, or first. Those were your upgrades from coach. There were no “tiers” in coach like coach “plus” or whatever extra legroom or no checked bag coach is called these days.
Seat pitch was the same for everyone.
They would charge more for window or aisle, that’s been a thing for a really long time.
Depends on the flight really. In your case I'd say yeah, it makes sense to upgrade; in my case I'm talking about a sub-1-hour flight that costs $60 in total without any upgrades. I'm on the taller side, but I'm still fine with a regular seat for such a short flight.