there's going to be a guaranteed shortage starting May next year so I'll be buying a couple years worth
It all depends on how much you are going to mix..
TBH, this should stop the bathtub mixers selling their juices or place them deeper underground so that a person will really need to look for them to know how to purchase it. Which isn't really a bad thing?
I'm planning to get some, not much at all as I'm on low 3/6mg nic anyway so a 1 litter of 72mg will last me over a year. The only reason why I'm going to do this is that a few of my favorite suppliers are moving to concerates only in the short term to see how it goes and to get around the TPD. I can must certainly live without them, so if it means vaping other juices, I can do that.
I must have over 1.5 litters of ready to juices that's over a year old, purchased during last black friday, I hardly brought any new bottles this year... and don't forget this "shortage" is only a short term thing while juice vendors get their heads around the TDP, even thou they have had over 2 years to do it.
In the long term, what I think will happen is the same as every other industry. The basic ingredients and flavouring will all be tested and approved.. then sold to the juice manufactures, which means that thier products will automatically be approved... yeah this does mean that some juices might not test the same as they use substitute ingredients.
In general I don't think the TPD is a bad thing, they need to be updated but it's a case of health and safety, to the everyday vaper it's just different and to the businesses; they are moaning as it's been like the wild west with far too many of them profiteering due to the lack of standards and rules.
TLDR: Don't panic buy a cause a stortage...