Because of the above, I demanded to only fly Delta, and I got the Amex Skymiles credit card. I built status, and often, got free upgrades to First Class. Another "not-a-luxury" thing. When you're boarding and you walk by all the First Class passengers, most of them are there on their company's dime, and nearly all got a free upgrade or paid a highly reduced rate.
The AMEX SkyMiles Credit Card also pays for your PreCheck or Global Entry. So even that was "free" for me (depending how you define 'free' and 'credit cards')
Once my wifes work schedule settles down, I plan on upgrading to the platinum amex.
If you fly infrequently, it's probably not worth the cost. If you do fly frequently, it probably is.
However, in response to the commenter whom I originally replied to, my opinion is Clear is not a luxury for only the wealthy. And it seems silly to prohibit Clear because of philosophical opposition to paying for expedited access.
For families it'd be worth it sooner, but if 2 parents join, you'll need to fork over $380. You could also put that towards your family holidays. E.g., it's enough for three tickets to Disney World.
(1) another comment stated that average regular TSA wait time was 26 min worst-case.