Top Gun to me it's just not an Oscar film. It's a popcorn flick and coasted by on pure nostalgia.
I'd argue a couple of things here, although I'm probably wrong.
1) Being a popcorn flick shouldn't prevent a film from being the best movie of the year. The Oscars have been too pompous for a long time and the belief that a film needs to be something other than a film to win is old fashioned. There's too many hang ups about deviating from the artsy template from the judges, which is why shite like Crash ends up winning.
Maybe they want to keep that clique going but if that's the case then The Oscars shouldn't be put up on a pedestal as the ultimate prize in cinema, when it seems to be nothing more than yet another fancy party for rich folk.
2) Maverick certainly had nostalgia in it but that nostalgia served a purpose. It had nostalgia in the sense that it was a sequel that referenced past events, but it was driven by a new story. Saying it coasted on pure nostalgia seems unfair, especially compared to the litany of movies that have come out in the last decade that are nothing more than "remember this from the original? We've got it here for no particular reason". Strangely, the first film that pops into my head like that is Ready Player One.