you do realize that the digital age has made serialized stories more popular than ever, right? With essentially anything being available whenever you want it, it's made jumping into series easier than ever, and as such more and more series are adopting ongoing story arcs.
What I was getting at when I referred to the digital era is that there are ever more distractions around with online games, social media, etc. and that erodes many people's focus on a complex storyline. The ability to understand it isn't there if the interest in doing so isn't.
And while following a series as it's progressing is fun, it's ridiculous to say that it's no longer enjoyable once it's finished. A good story will always be a good story, the enduring popularity of some long since finished series should be proof enough of that. That's not even getting into series are actually better once they're finished.
I didn't say it stopped being enjoyable at all, just that a lot of what made it great was lost once the time had passed. Awaiting the next MNOLG chapter, reading the latest comic, pondering the newest bit of information and discussing it all on here wasn't something you could do years later. By that point, you'd just be wading through a backlog of story, which may still be entertaining but doesn't have the addictive quality that Bionicle had for a lot of its run.
Like the difference between reading a newspaper when its headline event has just occurred, and reading it years later when the matter is history.
You're either interested in a story or you're not, "commitment" shouldn't be an issue. It's not like getting into a series means you have to absorb everything all at once. You don't have to read all of BIONICLE Legends at once, while also playing MNOG and watching Legends of Metru Nui.
I'd say you do. It's difficult to understand a story when the characters are referring to places, people and things you don't know about but should. And Bionicle was such a complex story and universe that this took a huge effort to do, especially when it had to be done almost all at once as new fans had to.
Spoilers are a risk you're going to have to take with anything, new or old. Just don't look up plot summaries and stay away from wikis and you should be fine.
How can the backstory be learned without the wikis?