SSD controller out of order
Purchased in April 2020, this SSD died in December 2021... The symptom: no read errors, but the data on the drive is completely messed up. No more partition table, and no way to find my partitions by scanning the drive. The data is probably there, but it's as if everything has been mixed up.
It's probably a bug in the disk controller, maybe fixed since then but I don't have any more info at the moment.