Perfumers Apprentice was around before vaping and will be around long after.I have quite a bit for flavoring, it will last me a long time. But I'm pretty sure flavors won't be a problem. But then again Real Flavors stopped making them and I heard FlavourArt maybe hard to find once vaping gets hit hard. But Capella is sold on Amazon, so is LorAnne. We just have to get water soluble flavors.
I prefer one of the Flavor Arts Strawberrys for my ADV but I do find with some of the others out there. I will adjust if I cant get Flavor Arts.