Thanks for the great links and for checking the ingredients!
On some of the packages that I still have, which are probably over 10 years old, there are zero ingredients, simply no information on that, on others it says sunflower oil, flavor (i.e. flavor within a flavor, very strange specification). Who knows what's in this sunflower oil? I remember from before that at least some of them taste very good. I've used a bottled powdered vanilla extract (about $18 for 15g, absolutely ridiculous of course) a few times, which actually adds a great, amazing flavor if you add just a bit of the powder, that is really super.
Beaver goo (and maybe other goo not being listed at all), whatever that is exactly, doesn't sound that delicious at first, especially not vegan. I actually didn't think that such flavors couldn't be vegan.
And missing specifications (so one absolutely does not know what is in there, something you might not know given the information available) and the fact that these large food companies, huge corporations, produce this, which otherwise probably mainly only produces waste, doesn't actually inspire confidence.
OK, yes, deciding case by case. I guess I'll just throw away all that questionable crap aromas I have (besides of the 18 $ vanilla extract of course).