Probably available for the next 2 years or so. With increasing challenges as time goes on.
Ordering directly from China could become problematic because of age verification requirements starting on 8/8. There will be US retailers that comply with AV but then you have to fear what your State might cook up as far as interstate commerce of tobacco products. Everything from drip tip to the bottom of your mod and everything in between is now deemed a tobacco product.
My State only has 2 exemptions for tobacco products being shipped from out of state (premium cigars and pipe tobacco). I'm pretty nervous about how they will view hardware. I'm almost certain they will include e-liquid under PACT Act regulations (no shipping. Face to face only).
It's very muddy how this is all going to shake out. Over the next 2 years individual States will end up being much more threatening than the FDA regs. In 3 years it could be decimation if nothing changes.