My system's SSD's are both 3 years old, and most of my friends' are over 5 years old. So I would say it is a problem.
Bit rot doesn't mean you're going to lose all your data, just that somewhere on the chip, there will be a cell with a charge that has potentially silently altered. If that's not okay, there are long term storage practices you can follow to ensure that in however many years, your data will be identical to its originally written state.
Can you please point me towards some resources?
There are resilient file systems that will spread ECC data chunks across multiple devices/media where bit-flips and partial media loss can be detected and repaired, sometimes automatically. There's offline backup software that'll do similar things.
https://www.backblaze.com/blog/ssd-drive-stats-mid-2022-revi...
Just make sure you have backups because hdd or ssd, disks fail.
And what’s the alternative you’re proposing, spinning rust? Is that what you yourself are using, is all your non-system data on spinning drives? Imo better would be “store all your data on quality ssds if you can afford it, and do 3:2:1 backup for whatever you can’t afford to lose”.
Just one piece of anecdata - I have a nas at home with 5x16tb seagate spinning drives, and a consumer grade 8tb sata qlc Samsung ssd in the sixth slot. One of the spinny drives completely died after few months and needed replacement. And the consumer-grade samsung ssd still going fine after 1.5 years of power on hours with a small but continuous write workload.