These days, the 18650 Li-ion Protected rechargeable battery has replaced the ubiquitous (2) CR123's that were all the rage 10-15 years ago after Surefire laid the foundation.
I know we've beaten the "flashlight recommendations" to death around here, but I'll stand by my go-to: Fenix PD35 with a charger and Protected 18650's.
Portable, bright, guilt-free lumens, enough modes for flexibility without being confusing. Mine was a gift from a friend and is one of my first-tier lights. Seems to do everything well.
As to a light being "worth it" that uses CR123's, only you can answer that based on personal preference. There are so many great flexible lights these days that use rechargeables so I'd hesitate to say a CR123-only light is "worth it".
HOWEVER... I'll tell you that I carry a Surefire L1 (Gen 6) in my pocket everyday. I use only CR123's in it. In fact, it's the only light I have that I still use exclusively CR123's. I have a Malkoff, a few Fenixs (Fenii?), Olights, a Novatac, Maglites, and other Surefires that I have bored, modded, with all kinds of other features... but if I were to give up every other light I own, the L1 would be the last light. The UI is sublime, the design timeless and bulletproof, I can take it everywhere, the beam, output, and form factor are perfect for any usage I can dream up. And I have not found a rechargeable that I trust in there like a good old-fashioned CR123.