This is the sort of case where we should be taking advantage of things like community FAQs and community wiki posts. If we had one single post like this with only one or two canonical answers that were collaboratively edited and maintained as information changes, it would be a much better resource than having a new question every however many months.
In this particular case, the info from the old post is very old. I don't see much value in keeping it - if we were to delete all the existing answers on it to modernize and align with a canonical answer style post, then we might as well start fresh and close that post.
Now, the question itself of "are SSDs worth the money" is completely subjective, and I would close it as "not constructive". However, a post along the lines of "how do SSDs work, what is the current SSD technology, and what are the pros and cons of using them" would be a lot more useful. I think in this particular case, we should close the old one, and make the new one really good, and make it clear that users should contribute to it as a collaborative piece of work to evolve over time.
For some starter material for this particular question, I suggest folks take a look at the SSD articles on the Super User Blog. We have some very nice, detailed posts about SSDs, including a really well researched explanation of what SSDs are and how they work by Kronos. These are things that can be quoted in our answer to this new question, and can also be referenced as a useful outside link.