Modern? Modern??? I like the game but it's modern in that 1978-era technology is "modern." The game ISN'T EVEN IN STEREO! There's nothing revolutionary about it; there's no unique playfield features. The bell is kinda cool, but it's not unique. There are a dozen games with cannons in them. Stern should have dumped that crappy low-res DMD 5+ years ago.
TSPP was a ground-breaking, innovative game, introducing all kinds of cool features and gameplay dynamics. ACDC is nice but it's not in the same league as TSPP. TSPP has tons more shots. ACDC is Stern simply picking a theme that doesn't suck as bad as their other themes, and doing a *halfway decent* version of it.
And because pinball manufacturers have been living 20 years in the past, when one of them adds a modern day piece of tech like RGB LEDs everybody freaks out like monkeys around a monolith. It's a shame the bar has been so low for so long that this makes a game "greatest evah!"
Yes, everybody is entitled to their opinions, but wait a year and see if ACDC is still as widely regarded. It won't be. Right now it's the flavor of the month.