The first rule of film is brevity. Pacing is absolutely vital and will make or break a movie. Synth and well executed montages (including night drive scenes sans dialogue) go hand in hand.
No coincidence that synthwave is very cinematic. It coincided with the absolute, undeniable pinnacle of film making. Even industry insiders will tell you truly great mainstream stuff died by the late 90's at the latest.
A movie could still be mainstream and make money but would be at least passable middlebrow art as well (tons of examples but think Manhunter, Thief, Risky Business, Near Dark - and these are just the ones scored by Tangerine Dream... - The Vangelis list starts at Mutiny on the Bounty and Blade Runner and goes on forever).
Movies were America's art form. Man makes art makes man, nowhere is this more evident than the current state of cinema and society (The once great Cameron is busy filming two more Avatar movies and Melissa McCarthy is helming the remake of Ghostbusters, shall I go on?). We are a flabby, tasteless rabble of goons, completely and utterly infantilized. Everything we consume is a sedative in disguise.