They are not meant as archival media. For as long their internal error-correction circuitry is not running the data fades.
Decided to run my backup laptop after two years of it in storage and there were serious cobwebs.
Windows would not boot. Had to leave it on for a few hours to let the SSD do it’s internal error corrections. It finally booted in slow motion (most people would have tried to reinstall windows at this point). Had to run chkdsk /r five times before it could push though to completion (even chkdsk was giving up, mostly at stage 5). sfc /scannow found many errors but fixed them.
Yet, the drive itself (using the SK Hynix own drive manager) reports 100% life left and both short and extensive SMART tests completed successfully.