This is VERY true. (I'm another 30+ year I.T. veteran.)
The job market for I.T. works much like other markets
Next, you need lots of experience. If you're interviewed by someone with I.T. knowledge, they'll be able to discern how deep your knowledge goes. If you're interviewed by people with less of a clue? You'll need to draw on your experience to figure out what buzzwords and tidbits to share with them to impress them.
Lastly, you can try to lean on certifications and formal education. This works *very* well for I.T. positions inside of school systems. (They HAVE to at least pretend these things have big value, since that's what they sell to all of their students.) It also has value for government jobs where everything tends to be scored and education gives you a certain number of "points". For everything else, it just depends on how much the people hiring believe in the usefulness of it.
Chasing what's "hot" is a waste of time, vs. just getting better at the things you deal with in I.T. all the time (whatever those happen to be). Software applications evolve. (Heck, I think IBM finally dumped all "Lotus" branded products last month, officially. Yet there was a time when skills in Lotus apps was a big deal.) It's more important that you're good at getting things done for the companies you work for than bragging about years of experience with particular tools or apps. Obviously, you had to work with SOMETHING, so of course you'd mention it. But it's a losing battle chasing the "cool new thing" that the magazines are writing about.