During the 1980s, the 12-inch single evolved from a niche tool for club DJs into a massive commercial powerhouse. Artists used the expanded runtime of the format to experiment with longer instrumental breaks, heavy synth loops, and dramatic vocal build-ups.

Yazz – "The Only Way Is Up" (12" Remix) . The radio version is happy. The 12" version is euphoric trance before trance existed.

202… Label: Sony Music / Universal / EMI (Now Music) Format: 4CD Box Set, Digital Download

The compilation you're looking for is Now That's What I Call 12" 80s

Now That's What I Call 12-Inch 80s: Remixed / Various - Amazon.sg

One could analyze how these extended mixes changed song structure, DJ culture, and dancefloor dynamics.

There were two major entries in the series released during 2021: