I have been playing lots of older classic games which were hailed to be some of the best of all time, but I honestly feel like much of that praise is nostalgia. Those games were really impactful back then, but with so many great games that came out in the past 10 years, much of the older games are obsolete.
Most acclaimed NES games had really rudimentary gameplay and inflated difficulty. I would say that there were probably more great indie games in 2015 than great NES games in general. Many N64/PS1 games have blurry textures and clunky mechanics, which were better refined in the 6th and 7th gen.
Final Fantasy VII for example was probably groundbreaking at the time, but since then, dozens of RPG's have mastered that formula ever better. The blurriness of visuals in the N64/PS1 era haven't aged well. Also, stories and plots which were once seen as profound are sort of cliche now.