Since there are a few free (eternal-september.org) or cheap places to get usenet text groups, yep, it is definitely worth it.
One plus, that is also a minus, is that most of usenet is not moderated. Subjects discussed can and do get way off-topic, crude and other negative things. But you can also have a lot of very good questions and answers that might not show up in the various other forums outside usenet.
But usenet is gradually dieing off. Most ISPs used to have a news server they worked with or had their own in the past, now most have dropped it. The sad part is that all too often, when they dropped usenet, no one noticed.
Yep. I thought I'd miss it when I went with Fios, which does not support news groups. Turned out, it did not matter to me at all. I can't even remember the ones I frequented. I do remember stopping alt.echostar years ago due to flaming and hateful posts.