Among the Sony PS-F9 and F5 (aka FLAMINGO), the PS-Q7 (aka Heli) or the Audio Technica - how to make vinyl attractive again when CD was just happening?

Make it portable, just like the myriad of 1960s record-players that used the same mechanical arrangement. Vinyl wasn't orange then, though, and miniaturized headphones didn't exist. Neither versions of the same idea could stand jogging, though: jogging was unheard of in the 60s (although plain running was) and the Walkman took over the portable field in the 80s. Exit the LP, portable or not.