Several vendors sell "flavor concentrate", essentially their own custom flavors for DIY. it's not a stretch to see if the FDA greatly restricted nic base availability, we'd still have a market for the flavors. They cannot ban the hardware (by and large) unless there is a safety concern. vaping 0nic with just VG/PG/alc+flavoring will almost certainly be an option no matter what the feds or big 'baccy decide to do.
I've been lucky that simple flavors work for me, so my DIY is assured.
I was not aware vendors sell blended flavors - can you give me a some names so I can try em out. Thanks.