Isn't it possible to change all entries to "No Comments Allowed" without having to go through each entry? If so, you might consider leaving this journal up. Just in case.
But LJ is indeed probably dead. It's been ailing since, I think, '08. That's when I remember a lot
of people suddenly ditching LJ for Facebook or blogs. I still check my Friends page 3 or 4 times a week, but now it's 90% RSS feeds from other sites and a couple communities that are still fairly active. People have taken their personal musings elsewhere, for sure.
Which is a shame, since Facebook and (especially) Twitter don't allow the construction of fun, funny, interesting posts that LJ does. Blogger comes closest to emulating LJ's format and potential: in addition to being able to ramble on as much as you like, you can "Follow" other blogs, then scan them from your dashboard in a manner similar to checking LJ's Friends page. I also like that if you comment on a Blogger post, you can choose to receive an update every time someone else comments--LJ's default of only notifying you when someone replies to your
comment can make it tough to keep up with other people's thoughts. I know it's possible to track all comments on LJ, but you kind of have to go out of your way to do it. I'm not super
familiar with Wordpress, but it doesn't seem to offer the same sort of community-based options Blogger does. I say all that to say (and to echo Desiree): go to Blogger instead!
I largely stopped posting on LJ because of the lack of response my posts would generate after the great '08-'09 Flight began. Of course, most of my LJ posts, really, were just things I share on Facebook now anyway: news links, videos, etc. Still, I do miss writing about elements of my own life from time to time. Nowadays, I put all my blogging energies towards an RPG blog
. Feel free to check it out, although it's exclusively pen & paper RPGs so I don't know how much if any of that would be relevant to your interests.
At any rate, I'll miss having one less awesome journal to read during my periodic Friends page trawl. At least we can be like disaffected old scenesters, sitting around and grumbling about how much better it was back then and how "if you weren't there, you wouldn't understand." Because it's true.