Its actually a pretty good question. I've seen your characters around MadCaddies, and I know you've been playing for some time, so the question does come as a bit of a surprise.
But then again not.
Back in alpha, when the DMs were figuring stuff out and experimenting, it was usually the case that they'd run smaller scale stuff and held that metaplots would follow, once the server went public. Thats not completely true, there were plots that were started in alpha, but generally things were run on a smaller scale. Ever since the server went public, there was the expected flourish of metaplots.
But this is where Oroborous makes a good point. Few of these concluded. Take the "Bowls of the Machine" now I know some characters devoted all their time to solving this mystery, and some got very far. Runt for instance. Not to mention the countless parties that went in their exploring and searching for clues with Runt and similar characters.
Then time ran on, PCs died, PCs didn't share information, PCs and DMs lost some interest. I guess the plot is still going on then, but I don't think as many people care, and few characters have interest.
There have been some successful metaplots, I think the Fingers of Termariel is the best example, but what made it successful was that it had a timeline, more than 1 or 2 characters were interested and it had an obvious conclusion (with perhaps a cliffhanger?) It wasn't perfect, but it was, in my opinion, a well run metaplot.
That in mind, I still had more fun doing a scripted quest with a DM at my back with a party in alpha then most metaplots I've seen/been in since. Things were smaller back then, stuff sorta got done. Loot was customized. You couldn't get to level 6 without DM help. Now, with so many well scripted quests, and metaplots, characters can make it big in no time and DMs are less involved in that process and spend more time on metastuff. Don't get me wrong, the DMs here are the best around, but I'm seeing them burnout a little, and I'm seeing them getaway from the sorta stuff that I just know we both, PCs and DMs, had a blast doing in alpha.
So I guess my tagline is this, yeah, there's metaplots, some are pretty good, most don't seem to conclude in a timely fashion, and lots of them aren't actually as fun as they sound. A DM that runs a small quest for a party that lasts 20-30mins back in the day was alot of fun. It was more personal on that level, and good for advancing characters outside of scripted quests, and not as diluted down as some metaplots can get.
Well thats my 2 cents, thanks for reading and Rock On, as Starry would say.
-Cullen