So true. It's odd to see how drastically things have changed after being away for a while. I lived in Irving (Valley Ranch) back in the early 2000's.
Plano was every bit a Texas suburb for those who wanted no part of big city life. Even Addison was a sanctuary for young professionals wishing to separate.
I lived in Plano from 1984 - 2000 (from 3rd grade through college; went to UTD), and my family still lives there. When I was a kid, it was a magnet for business because of tax deferments and because its employees could live nearby without dealing with the fustercluck that was (and still is to a lesser extent) US 75. It exploded while I lived there and has exploded even more since.
When I lived there, Addison had plenty of young professionals who wanted to be closer to Dallas but not in Dallas. And of course, it (along with Buckingham) was where you could buy liquor. That was its big appeal.
Fond memory - I remember my dad going to Red Coleman's liquor store (when I was 10) and I tagged along, and some busy body tool of a customer scolded me ("you're not allowed to be in here, son.") My dad said, "He's my son, not yours, and he's with me. Leave him the hell alone."
Frisco was a smaller country town in my eyes. Lots of undeveloped land, country folks, and little to do. None of that applies anymore in these towns
You forgot the nude modeling studios that used to dominate SH-289 (Preston Road).