Depending on how long they have been unpowered for, it's hardly a bad idea to do a full read of all sectors from beginning to end and check the SMART...
One lesser known fact about SSD durability is that their data decays if they don't receive power for long enough, making them unreliable for backups...
Fwiw... you're very correct anon as I just had one of my SSD's go flakey, but it didn't go down completely dead like I've had HDD's go in the past.
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