Do not rely on decades of archival storage on SSDs.
For that sort of archival storage, you should be using appropriate technology (maybe tape drive or blue ray) and appropriate care to maintain the archive. (multiple backups, move data to new tapes/disk as old devices age)
It isn’t something you can just “slap” on a drive and chuck into the corner and forget about in 20 years … if you want to ensure at least some data isn’t lost along the way.
