I give it 8/10.
So... I am turning 40 this year. I literally grew up right along side the "video game revolution". I have owned the Atari 2600, NES, Gameboy, SNES, Sega Genesis, Gameboy Advance, N64, Playstation, Game Cube, Playstation 2 (several), and for a hot minute... a Sega Dreamcast. I have not personally bought a new console since my last PS2, but I have played them all. I now am getting back into video games in my spare time but primarily on my PC. I LOVED the NES when I was a kid. Easily one of the watershed moments of the video game industry was the introduction of the NES. No argument there. But... does that single fact automatically make it the GOAT? I think not. Because, lets be fair, the thing also had a host of issues that Nintendo in some ways created for the system by its design choices, and hardware decisions.
To make myself completely clear tho... I don't put ANY system into the "perfect 10" category. I think that is fallacy. Because as new technologies come out, game play develop, and creators get more creative, the whole industry has to shift to meet the ever changing landscape. I mean... you just can't put a NES next to a PS5 and go "which one is better?" It's asinine. That's like comparing a Model T to a Tesla. The two reside in completely different realms of realities and are very much products of their times despite having their roots in the same humble beginnings. The NES was the best of it's TIME. But That was what it was... OF it's time. I still think people should check it out. It can be hours of good old fun. But let's not sanctify something just because it has boat loads of nostalgic value attached to it. I also put the SNES and the N64 at the 8/10 spot with the NES. The NES is just the progenitor of arguably the best known video game company there is. It made "Nintendo" a household name. Still not a GOAT tho. Sorry.