I want to be confident of a quality vape for 10 years (may be 20) but not over spend in the process since may be the products I prefer will remain available or may be there will be a compelling reason to change what's in the stockpile. Everything stays new in the box so I only buy what's needed. If I need to take something out of the stockpile for daily use it's replaced with something that stays new in the box. (I haven't bouught a new style of mod or atomizer for daily use or for the stockpile in more than a year because I don't see anything interesting.
May be I'm not a typical vaper because I only keep one atomizer juiced up at a time, use only one mod 99% of the time and mix only one flavor. May be that sounds austere but it turns out to be all I need.
Lol, I thought I was the only one. Have a TON of mods and tanks that have never even been opened. Large # of factory coils for the tanks that need them (several years of coils for each tank), and then my rebuildables as well.
I too feel the same, that once a tank or a mod has been opened, it's out of the stockpile and due to be replaced. Been using the same one or two tanks for the past 3-4 years, and typically have one single and one dual battery mod that are for daily use. The rest of my stockpile is to replace something I use daily that breaks or wears out. I'm planning on opening up a new dual battery mod in the next few weeks and trying to decide which one I want to try, lol.
My nicotine concentrate is frozen, and if I stay primarily at 3mg, I have enough to last over 30 years are my current usage rates. Still once/year, I purchase an additional 1/2 L of 100mg nic in case any of it goes bad or I got a bad batch, I have newer stock to replace it. At how little it costs to pick up an additional 1/2 L per year of the 100mg nic, it's worth it to me.
I also stick with ONE flavor of juice, UNFLAVORED, and I mix a liter of it at a time. Not only do my coils last forever with unflavored juice, vaping for me is about an effective way of delivering nicotine, not 'tasty' juices.
So trying to only buy new mods here and there, an extra tank sometimes when something that looks promising comes out, and then my 1/2L of nic juice each year.
So you aren't the only one. We sound pretty similar in many respects.