> ...then you need to keep it powered down in a controlled environment
Mold and water damage can be mitigated with environmental controls but even then you're going to have decay issues because so many components just break down overtime. Many plastics just become brittle and disintegrate over time with or without exposure to UV. 10 year old devices have their softtouch rubber turning to a gooey sticky melting mess. Electrolytic capacitors and batteries leaking are commonly known but lesser known issues occur. The MFM Drive testing that Adrian's Digital Basement did recently comes to mind, 5 of 5 drives he tested were dead. One was a drive he'd validated a year prior and stored correctly.
Mold and water damage can be mitigated with environmental controls but even then you're going to have decay issues because so many components just break down overtime. Many plastics just become brittle and disintegrate over time with or without exposure to UV. 10 year old devices have their softtouch rubber turning to a gooey sticky melting mess. Electrolytic capacitors and batteries leaking are commonly known but lesser known issues occur. The MFM Drive testing that Adrian's Digital Basement did recently comes to mind, 5 of 5 drives he tested were dead. One was a drive he'd validated a year prior and stored correctly.