I haven't bought this game, and I thank whatever misshapen deity made me in his (or her?) image that I didn't.
I'm a huge Fallout fanatic, and I have friends who put me to shame in terms of their obsession with the Fallout universe. I've played all the Fallout games, my friends can name all the programmers and tell you hodgepodge facts about the Fallout games. They're super-dee-duper-fans, and now they fucking hate themselves because they desperately tried to make Fallout 76 work for them.
I watched them play, and after laughing hysterically at watching enemies get frozen in place by faulty obstruction code, I gave up after the server crashed three times in an hour and went home. It was mentioned to me that you can start the game solo, but that doing so would just be sad because then the game is basically like (in their super-fan words) "playing an open-world version of Doom where the demons have all given up due to chronic epilepsy" and that if you're playing with people then you at least get to be miserable with company.
One friend was unfortunate enough to splurge for the canvas bag bundle that cost him around $200, and he received a cheap nylon bag. Bethesda said that they were sorry, and (without asking if it would be sufficient) compensated him with $5 worth of in game currency. He cried, I'm dead serious. I watched a full grown, 250 pound, bull-dog of a man, cry his eyes out because he sank so much money into what amounted to be a nothing-game. This same dude played Morrowind for over 300 hours, he basically surveyed the entirety of the map just because he felt like it. He has sworn off of anything Bethesda related because of Fallout 76.
The idea that I saw with this game is "Fallout with friends is going to be more fun". That's fine, except Fallout 76 is hardly an actual Fallout game. From what I've seen, it's more like a shell of a Fallout game where the players are expected to mindlessly rummage through interactive containers. The story apparently involves running through tasks that a deceased overseer had intended to run though, at no point was it made clear what reward (storyline or otherwise) would come of completing these tasks.
The lack of NPCs seems to be an experiment gone awry. It's fun to test out a Fallout world where you will only encounter actual people playing the in-game characters, but it doesn't amount to anything worthwhile in the long run. It turns out that there's almost nothing meaningful to running into a different person who plays, apparently the PvP area of the game still requires a mutual agreement between players before anyone can damage anyone else. You could share thoughts with that person if you both have a Ventrilo server or something like that, but then you could just stop playing the game and go talk to someone in real life. I loved that Fallout 4 was immersive, because of how my actions affected the NPCs. Apparently in Fallout 76, the players that you run into are supposed to fill that void and it just doesn't work.
One friend said that he wanted to play simply so that he could just run around and kill things for fun, and he hates this game. Watching him play, he was noting that he never realized just how intricate certain first person shooters are in terms of enemy placement and difficulty. He said that running in circles for ten minutes to kill one thing because the game starts you out with shitty weaponry was what killed it for him.
When this game was coming out, I was hearing all these ideas regarding types of gamers that this game was designed for and reasons for which one could have fun while playing this game. I can assure anybody reading that my friends fill the spectrum of gamer types completely, and the ones who were supposed to love this game and -- to their credit -- desperately tried to love this game found themselves hating the game and hating themselves even more for having faith in in. The reasons for which someone might want to play the game are invalidated by the game itself. It's a buggy mess that's devoid of meaningful interactivity, that for even the type of gamer who enjoys turning their mind off and just exploring a virtual landscape, ends up being an exercise in futility.
I think that Bethesda has made a lot of people into Rockstar fans with this one.