SL-C1000 (~2004) → SD card went bad. Internal flash FS issues required reinstall.
Nokia N810 (~2007) → SD card went bad. Internal flash FS issues required reinstall.
Nokia N900 (~2010) → SD card went bad. Internal flash FS issues required reinstall.
One 16 GB USB thumb I had (I admit for quite some years but barely used): destroyed recently, suddenly. 2 GB USB drive of my wife, a few times used it as live CD and boom doesn’t work anymore. 4 GB one still alive, used to replace a 4 GB USB drive in an Edgerouter Lite (3 years old). Bet the replacement gonna die soon tho, cause it was used in past to make a Hackintosh boot. PATA <-> flash on a Pentium OpenBSD router (self-build, around 2005 or so?) IIRC it was like 32 MB or something low like that. Went bad after a few years. Gotta love /var/log I guess.
SSD which gone bad just by running Debian GNU/Linux Testing on my Thinkpad (~2008-2010). I guess I shouldn’t use a lot of tabs in the browser.
I’m not even counting all the Raspberry Pi installations which went borked. Because God forbid you write to flash. After going with /var/log on tmpfs, things got more sane, but that’s an ugly hack.
Sure, HDDs died, too. But not as much, and not as quick. They actually got a funny curve: they usually die at the very beginning (DOA), or they last long (there’s some exceptions like bad series like Deathstar). IIRC I got that from data by Backblaze.
SSDs have improved ever since that fiasco on the Thinkpad though. They can handle much more writes nowadays, even consumer-grade.
The amount of industrial grade and commercial grade (micro)SD flash which I managed to destroy past years: ZERO. And I got like 6 or so (?) in use. I do get it; I actually use my hardware…
You get what you pay for…
But there’s good news! On a smartphone, you can work around all of the above by not writing to the microSD card much (or actually: by doing it, thereby saving the internal soldered flash!). For example, you can have that entire MP3 collection on your microSD, and read it a lot, but not writing these lovely precious GBs. High quality Netflix would degrade your SD quicker than low quality. But since SD cards are kind of cheap anyway, you can work around it by writing it off when it dies. Just make sure you got backups!