We moved to Plano (after a year-and-a-half in Tampa) in 1991. Before Tampa, we had lived solely in Dallas and Garland, and my interests were purely urban. So I didn't know about Frisco until the first time I drove 121 and saw the "establishments" in question (and yeah, I was seriously all "WTF?").
Can't tell you about the history or anythng, but I do remember that this was about the time that the whole "Legacy Corridor" was springing up, which of course had a spillover effect, which of course also resulted in a massive "cleanup" of Frisco's more. The cleanup was accomplished with very litlle fanfare, I do remember reading a little something in the Observer or someplace about it, but that was it. I'd like to know more about the "Golden Era" myself, because, yeah, that stip on and just off of 121 was as blatant a strip of cathouses as anything I've ever seen anywhere.
What Frisco's "famous" for now is Stonebriar Mall, that velodrome out in the middle of nowhere, and the Frisco Roughriders, the Rangers' AA team. You'd think that the presence of the latter would at least insure a market for the old goods and services, but if it's there, it's waaaaaay underground.
But Frisco to McKinney is still rural, although it's getting developed, slowly but surely. Plano's built out, and people still want to live north of Dallas, So Allen, Frisco, and The Colony (now THAT'S a wierd-ass place....) are catching the spillover.
And there ain't a good record store in the bunch. A pox on 'em all.