Any online retailer that requires a photo-copy of my DL is not getting my business. That is begging for identity theft, not to mention, if you give me 20-minutes on my PC, I could easily "forge" any DL you want, with any info and picture you desire.... Requiring a photo ID for online purchases is about as "reliable" as asking someone to validate their age by checking a box or entering their birth-date....
Flavoring, PG, and VG should still be available for at least 2 more years. Maybe even longer, they are still used for other things besides ejuice. 18650, and 26650 batteries will still be used for flashlights, and other things. The vape industry will not end we will just have to find other ways to get what we need.