There isn't much benefit of a dna 30 or 20 for the 10-15 watt single coil user at all.
The more watts = more Kanthal . The 30 will allow more power pushed to dual coils and micros, The DNA 40 will benefit triple micros, The DNA 50 will allow quads with no effort.
Many mechs will allow around 50 watts. The DNA mod is allowing VV mods to start benefiting by the allowing more watts.
I see much testosterone flowing and the new to vaping crowd pushing their limits.
There will be some - guarantee it, that will be running .5 or less sub ohm on 30w - I see that as potential meltdown and ridiculous unless one is aware, knows what the dangers are and practices safe vaping with a skill set to manage big watts. There are seasoned and informed vapers that will also appreciate the benefits.
I see battery makers loving this.
I see a new product I could market, a vaper's glove

. Not this guy.