Akira came out back when mature themes and suggestive references were scarce and not so the norm now a days. I have a GREAT amount of respect for Akira solely because they hand drew all of the cells. That level of detail without significant computer assistance doesn't occur anymore.
The plot was kinda like, meh. I would never call the plot anything more than decent, but it was the combination of the characters, themes(both obscure and mature at the time), and animation that REALLY set it apart from everything. For me it was far more driven by its presentation and the handful of characters that I got attached to briefly. Overall its really cut n dry plot wise but its how they got there that made it a classic.
Akira could come out now with the common digital nuances and it would be maybe above average. Its timing and ability to stray from conventions that were being established at the time of the greats such as Robotech is what deemed it a classic. An exmaple would be how all of Akira's face models all are FULLY articulated and have full fledged (life like) movement during all types of dialog(many studios used[and still do use] lots of stock footage with faces to cut corners). Another would be some of the angled shots and panning that demand a high level of detail both in the foreground and the background.
OVERALL...Akira is a technical masterpiece that kinda was the mario 64 of anime(lol my point is similar so I had to make the reference) movies. Combine that with some themes that really REALLY broke the mold in the late 80s and you have something great.
Honestly, kinda how some people don't see the big deal about Evangelion....I feel like you have to be an anime enthusiast at some point to really appreciate all of the subtleties in great work in general. Its kinda like having a great appreciation for melee after playing it for years and seeing the little things being executed at high level.
EDIT:I am not calling akira one of the best anime movies ive seen or anything, but its def a staple. I can probly name 4-5 movies that I liked more overall but its impossible to deny its technical prowess and the way that it set the bar for animation/presentation in movies.
EDIT2: TIME to go troll some apple geniuses....to stamford!!!!!!!