It is a valid question.
Second Life is truly dying - I've been there on and off for ten years.
If not through Linden Lab's horrible mismanagement, through simple attrition as there simply isn't anything to do there anymore. The novelty has worn off. We're well past the days when a well scripted game gets ported outside of that ecosystem and turned into a Gameboy title[1]. We're well past the days where someone can make a ton of money selling virtual land[2].
The value proposition isn't there anymore. The starry-eyed excitement that surrounded both Linden Lab and the player base when the world was in its early days has been replaced by cynicism and apathy.
I'd say rebuilding the game with what they've learned in mind is probably the only way to shake things up. Hence the upcoming sequel.
[1] http://en.wikipedia.org/wiki/Tringo
[2] http://upload.wikimedia.org/wikipedia/en/e/eb/AnsheChung_Bus...