There is little good reason for most us to buy or use DIN tanks. There is only 2 good reasons to use DIN over yoke. Those are less snag hazards and using high pressure tanks, so unless you are doing overhead environments or high pressure tanks, there is no good reason to choose DIN over yoke. The DIN threaded connection is stronger than a yoke but it is also subject to more damage than a yoke. That extra strength is only useful with HP tanks -3.5k PSI and above. On the other hand, yokes are plenty strong enough for 3.5k or less tanks, they are much more common- at least around the US and Caribbean and are more robust. DIN like many other things in scuba is shrouded in hype and misinformation.