I'm sorry, I can't agree that the parasitic drain of a "good" HDS is comparable to CR123A self-discharge rate. First, my "bad" Ra Clicky Ti measures over 1 mA, which means it completely kills a CR123A in a couple of months, even when not used at all. OK, that's a "bad" one; I'm going to get mine fixed. But I measured two first gen (pre-Novatac) HDS EDC's and they are both right around 100 uA. I strongly believe this is in the normal range. And it is enough to pretty well kill a CR123A in under 2 years. The shelf life of a CR123A is at least 7 years before it gets strongly weakened, let alone completely discharged. I rest my case.
Maybe a RCR123 will last about as long in a "good" HDS as on the shelf, but not a CR123A.
And maybe, just maybe, the current Clickies have a lower parasitic drain than the first gen HDS. But I STRONGLY doubt it. If I ever get one, I'll test it; it's simple enough. And I'll test the Ti after fixing.
Understand, I'm not criticizing the 100 uA parasitic drain, but it has to be considered in how you use the light.