YES! It's kind-of frusterating, for someone like me, that can't afford to be buying TWO levels of nicotine, if I want to use the newer tanks, AND my older RDAs and tanks... For instance, I'm using my Smoktech dripper RDA right now, at 11w on my kanger subox... if I were to switch to my subtank mini, i couldn't possibly use 12mg nicotine, because NONE of the coils i have are above 1ohm... and the subtank mini's airflow is too damn airy, even at the lowest setting, which means my 12mg nic will blow my head off my throat! So, I vape my subtank mini at 7w w/the smallest airflow hole, w/12mg nic, and, I just take shorter hits, and less drags all-together.
There is nothing we can do about the changes in the gear available... we just have-to adapt. So, if that means keeping 30ml of 12mg for my older RDAs an tanks, and 30ml of 6 or 9mg, for my newer tanks and RDAs, then so be it... I will always use lower wattage, i just dont like warm vapor as much as cool vapor with a nice throat hit.... but, at-least i know HOW to enjoy the old & new tech, right?
Just adapt and adopt new practices man, it's easy, and, the new gear is leapyears ahead of the old, which is nice.