Not every nerdy person is into Star Trek?
Star Wars is imo way more mainstream than Star Trek these days (especially with Disney pumping it), but even then there are tons of people in their 20s working in tech who haven’t seen it and have no interest in it.
I don’t think there was more than one person on my previous Android team who would’ve gotten the Tricoder reference, and I was the youngest person there (29 years old at the time; learned about Tricoder literally just from this thread myself).
If you picked a random person working on Android source code and asked me to guess whether they know about Tricoder (without knowing any additional info about them), I would have decisively guessed “no”.