The most common catastrophic failure you’ll see in SSDs: the entire drive simply drops off the bus as though it were no longer there.

Happened to me last week.

I just put it in a plastic bag into the freezer during 15 minutes, and works.

I made a copy to my laptop and then install a new server.

But not always works like charms.

Please always have a backup for documents, and a recent snapshot for critical systems.

to be perfectly fair though, this isn't a new failure mode when SSDs arrived on the scene.

drive controllers on HDDs just suddenly go to shit and drop off buses, too.

I guess the difference being that people expect the HDD to fail suddenly whereas with a solid state device most people seem to be convinced that the failure will be graceful.

Always make backups to HDD and cloud (and possibly tape if you are a data nut).