I have some MFS nic from around last February that's been living in my freezer, been vaping this unflavored lately
It's picked up a slight tint, but not a 'new' smell beyond what a new bottle of WLR or MFS give me. The flavor is still spot on, in fact I think its improved. And if you're primarily an unflavored guy like me, these small changes are the stuff of life. This thing is like a fine wine now
I'm guessing whatever oxidizes over time (nic, trace tobacco residues, who knows) contributes significantly to this.
By way of comparison the WLI that I only touched recently since shortly after this review, remained exactly as it was in appearance and flavor before I put it in the freezer. Perhaps less trace residues in there.
Its funny that when you prioritize unflavored vaping these things take on a different significance. I intend to order more WLI when possible, for use with flavors, but I really find it a bit flat for unflavored use unless I'm really aching for a fix, and at that point, anything would be good. OTOH the MFS despite yellowing a touch has actually grown into a nice tobacco vape.
I think I've said it before too, but its remarkable how similar, especially now with age, the 'less pure' nicotines are to snus, minus the bergamot, etc of course
Does anyone have longevity observations they'd like to share on all the usual suspects? Wondering how ECX has held up for people, XTR, etc