|The main difference between RDAs and tanks is flavor. If I got the same quality of flavor from a tank I'd have little interest in using an RDA. If you're not familiar with what I'm talking about, it's not a subtle difference that only a highfalutin wine tasting snob might pick up on. I often have the same e-juice in my tank and RDA, and it's a fairly dramatic difference. If you've vaped your favorite flavor ONLY using a sub-ohm tank, you haven't really tasted it. You've only kind of tasted it. Like hearing your favorite song playing in a room down the hall.
Once you get over the fear of tinkering, the only drawback I can see to using an RDA is that you do have to carry juice around. That, and they're not as "road-friendly" as tanks.
As promised, I am not going to end by saying "it's a matter of preference". No, I'm taking a hard stance and you can do with it as you like.
RDAs are better but have a good tank for when convenience is more important than flavor.
Right now, some of you are thinking, "Sam, you idiot, don't you know you can get the best of both worlds with an RDTA?" Perhaps. I bought one and ended up never using it. It leaked everywhere and I thought it was kind of goofy. Maybe I'll give RTDAs another shot and report on my findings.