CRTs from 1994 and 2002 still going strong. LCD tvs from 2012 and 2022 just went kaput for no reason.
Old hardware rocks.
Most likely bad capacitors. The https://en.wikipedia.org/wiki/Capacitor_plague may have passed, but electrolytic capacitors are still the major life-limiting component in electronics.
They still degrade with time, but in a very predictable way.
That makes it possible to build a version of your design with all capacitors '50 year aged' and check it still works.
Sadly no engineering firm I know does this, despite it being very cheap and easy to do.
https://www.badcaps.net/forum/troubleshooting-hardware-devic...
For logic and DRAM the biggest factors are how far they're being pushed with voltage and heat, which is a thing that trends back and forth over the years. So I could see that go either way.
The only MLC I use today are Samsungs best industrial drives and they work sort of... but no promises. And SanDisc SD cards that if you buy the cheapest ones last a surprising amount of time. 32GB lasted 11-12 years for me. Now I mostly install 500GB-1TB ones (recently = only been running for 2-3 years) after installing some 200-400GB ones that work still after 7 years.
As a counter anecdote, I have a lot of SSDs from the late 2010s that are still going strong, but I lost some early SSD drives to mysterious and unexpected failures (not near the wear-out level).
I suspect that 2035 years time, hardware from 2010 will work, while that from 2020 will be less reliable.