I don’t know what the first part means, but that’s fine.
I’ve never seen any meaningful data or conversation of freezer stored lypholilized vials not lasting. I’m more concerned with vial degradation causing peptide issues.
I’m not opposed to buying a freezer, but if I’m that serious, I might as well buy two for redundancy. Jano says or implies the advantage of -40° is negligible compared to 0°.
Efficacy isn’t a light switch, usually. If in 40 years my tirz has degraded 50% in the sealed vials in the freezer, I could, in some theories, increase my dose to restore efficacy. If I don’t have the peptide, I can’t take any dose.