I don't think there's a need, but there is definitely a demand for them. It's a "because we can" kind of thing.
315W, the iJoy Maxo.
Wismec has a bad reputation due to its 510 connections, iJoy seems to have the right idea but rushes gear out to be able to compete, VapeOnly is a smaller brand and seems to have borrowed the cheesegrater design... I'll go with the Smok GX350. They also have purple, which is always a bonus.
Koh Gen Do most of the time, Rayon in RDTAs because it wicks quicker.