I'd say gone too soon is definitely worse.
I can decide to not watch something that has been made.
I cannot decide to watch something that hasn't been made.
Sure, it'd take me a while to figure out said show is no longer worth watching and during that period I'd be wasting my time and somewhat spoiling the feeling left-over from the other episodes. But those good old episodes are still there, I can still look back fondly on them as they were actually made and if I ever decide to rewatch the show I know exactly where to stop to get what I consider a complete and fulfilling experience.
Achieving that complete and fulfilling experience is possible with a show that's overstayed it's welcome, it's harder certainly but possible. On a show that's gone too soon it's impossible. Which is the far worse fate.
I can decide to not watch something that has been made.
I cannot decide to watch something that hasn't been made.
Sure, it'd take me a while to figure out said show is no longer worth watching and during that period I'd be wasting my time and somewhat spoiling the feeling left-over from the other episodes. But those good old episodes are still there, I can still look back fondly on them as they were actually made and if I ever decide to rewatch the show I know exactly where to stop to get what I consider a complete and fulfilling experience.
Achieving that complete and fulfilling experience is possible with a show that's overstayed it's welcome, it's harder certainly but possible. On a show that's gone too soon it's impossible. Which is the far worse fate.