Sure. Unless the o-ring of one of the yoke rental tanks decides to leak, blow, extrude or otherwise fail. I'm sure you've had that happen. So have I. I've never had that happen with the DIN o-ring in my own reg.
I
have had an o-ring 'blow' getting ready for a Bonaire shore dive, but it was where one of my 1st stage port plugs had somehow worked a bit loose (I've replaced a tank o-ring I wasn't happy with, though). Which brings up an interesting point; even if I used DIN, I'd probably still bring a little plastic box of extra o-rings of various sizes.
Bonaire shore diving is known for that faint, hissing sound of old, dry o-rings that don't seal ideally. Of course, it's also known for much greater availability of yoke rental tanks; I assume you're need DIN valve tanks to benefit from using a DIN regulator.
I don't have a link conveniently to hand, but I recall on one of the old 'DIN vs. Yoke' threads, someone opined that when carrying tanks
not hooked up to a reg., like a few rental tanks bouncing around in the back of a rental truck driving around Bonaire, the DIN tank valves having threads created the potential for those threads to get dented. At least, with a heavily used rental fleet of tanks.
Wonder how the odds of that happening compare to the odds of a tank valve o-ring failure?
Over the course of a few U.S. & Caribbean dive trips, what is the greater inconvenience; messing with an adaptor (that doesn't leave you with DIN benefits) on rental tanks, or diving yoke all the time (even on your own tanks) & 'extra' o-ring failures from being a yoke user? Put another way, do rec. divers mainly using rental tanks in the U.S. & Caribbean at mainstream travel destinations use DIN tanks often enough to realize substantial benefits on average?
Richard.