I personally believe that for the majority of cases, metal "bands" where every member contributes in a more or less equal way run the risk of falling into genre pitfalls.
It seems that most people getting together to start jamming start with a specific genre idea usually relating to 3 or 4 of their favourite black metal bands, or whichever genre they want to create together to find that musical common ground together. In so many cases this just creates this completely redundant musical project where you have a guitarist trying to emulate old mayhem riffs, another guitarist who worships wolves in the throne room, some drummer who just listens to suffocation all day, and a bassist just pedaling 8th notes. I don't think it's necessarily the fact that the "band" idea itself is obsolete, more so very difficult to find musicians in the metal or any "band" genre I suppose, that aren't just people making a point of emulating some kind of genre that they personally enjoy. Of course it is impossible to create music without it being lumped into some kind of style, however, I don't believe one should be making music with the goal of emulating a genre in mind, I believe the best music, that I've heard, and that I have created myself has been inspired by actual human emotion (be it anger, rage, passion, belief, personal darkness, spiritual goals, misery, etc,), as opposed to "generic technical death metal band #79"'s third album which all four members of the band agreed was an awesome album.
My personal opinion (which may be unpopular), is that it is split more or less into three categories to me. I believe there are fans, musicians, and artists.
Fans being an obvious definition, but often times fans will pick up instruments, like how we all started, and one either progresses from a fan into something more, or as in many cases they more or less stay the same. These fans which are now playing instruments basically have no creativity and never will, but may be good at playing moderately challenging riffs, etc, and enjoy jamming with people once in a while because they think it sounds cool and it's fun. Usually, from my experience, these are the people playing instruments who only identify playing music with whatever band(s) or musicians they're trying to emulate and maybe the next Cannibal Corpse song they learned to show to their other long-haired band shirt friends.
Then musicians, which are less common in the metal world, but still around. Musicians I find are the guys who CAN be the biggest pricks to create music with, as they're usually the guys who don't fully relate to the passion of music or the power of it, or any kind of deeper meaning for that matter. They just take music as a competition of musical and theoretical knowledge. They know all their chords, have many scales memorized and compulsively make youtube videos of them "shredding" in the hopes that someone will come along and stroke their ego once more. Albeit that often times, these guys can be very talented at PLAYING music, and having the ability to learn things quickly and playing in key, they almost always lack any kind of interesting creativity and generally have nothing to contribute artistically unless it shines the spotlight on them, and even then, no one cares.
Then finally, an artist. Now THESE are the people who make amazing bands, and THESE are the people that have an unified image of music beyond just sound, egos, and genres. These are the people that view music for what it really is, which is art. Take a piece of music that someone has written who is a person who just been to at the bottom of the barrel in life, and is in NO WAY thinking about his favourite band at this current time, but does however decide to write a piece of music to reflect on this absolute shit he's feeling, murderous rage, or spiritual progression, whatever emotion given it's genuine. Those are the pieces of music that actually mean something, and almost always have to be personal experiences that could only be written by one person. However, I do believe once someone has written a vast majority of a piece of music like this, it has the ability to be expanded upon by other like minded artists or even musicians to bring out other sides to something you may have never thought of.
So I would agree that metal "bands" are somewhat obsolete, mostly because the majority of metal fans and musicians don't necessarily have any artistic vision, except being "black, death, thrash, progressive, or technical"