Inadequate? No. I think there should be more quality tanks on in the market that are comparable to the Nautilus or Mini, and not just RTA's.
Sub-ohming is really popular right now, the market is being saturated with new ones all the time. If you're not sub-ohming, there's few options out there for people who don't rebuild regularily, if at all, or don't want crappy iClears. Nautilus is pretty much king in that market in terms of airflow, reliability, and quality in a tank. But it's nice to have other great options... There's counltess options for sub-ohming at least, but what about the other type of vapesters?
Kanger makes a few high-ohm tanks, but good luck finding coils for them at your local B&M, most of them don't even carry those tanks to begin with anymore since they're old technology, but can i blame them?