@swope @Aaron_DeVries it’s inherent to all SSDs, to varying degrees, because it increases leakage from the cells — from memory offline storage at temperature is actually worse than online behaviour.
you can certainly design SSDs to be better at high temperature, mostly by doing the normal things to decrease leakage, like single layer cells, decreasing density of the cells, increasing the number of error correction bits, etc. you can also just mitigate the online case in firmware, by increasing cell refresh frequency.
such SSDs are manufactured, primarily for industrial, aviation, automobile, and similar applications, and especially targeting such markets you’ll often find data sheets giving a lot more detail about retention at temperature.