It’s a (maybe) engineer pondering things. In parts interesting, in parts long-winded, definitely not scientifically rigorous - just pondering, which I do a lot of myself. All we can really do is decide for ourselves. I have indeed thought about the "structrual" problem, and subjecting tubes to an unecessary freezing cycle. But what do I know? I’m not a structural, materials, chemical, electrical, nor tube engineer. Tubes don’t have a virtual machine or compiler for me to get into how they work.
I’ve had cryo tubes from various sources over the years. At times I thought some of them sounded "awfully" good for that tube type/brand. So when I started regularly buying sets of 6H30 and KT120 from Upscale (every 2 years or so), I would often tick the "Cryo" option, at an extra 8 bucks a tube. Did this for several sets over the years. But then just stopped - realized I wasn’t hearing a meaningful difference versus non-cryo sets of the same tubes. Got a mix of both now in my stash. But I haven’t bought cryo in years and won’t anymore. I won’t kick the cypos out of the stash either, but it’s just a "meh" and "cool sticker" when I think about it now. Nothing takes the "exotic" feeling out of something like repitition and familiarity.
