My previous DSLR was a Pentax K30. It started to malfunction (about 5 years into ownership).
Guess where? The physical aperture actuator. They're supposed to work for hundreds of thousands of uses, but this one got maybe 20,000 before it began to stick.
I don't worry about the mirrorless camera electronics so much, and even most digital SLRs are quite reliable (even the replacement Pentax K3-II has been flawless). This was a pretty remarkable failure because it stands in contrast to the typical reliability of digital SLRs.
Guess where? The physical aperture actuator. They're supposed to work for hundreds of thousands of uses, but this one got maybe 20,000 before it began to stick.
https://www.pentaxuser.com/forum/topic/the-dreaded-k30-apert...
I don't worry about the mirrorless camera electronics so much, and even most digital SLRs are quite reliable (even the replacement Pentax K3-II has been flawless). This was a pretty remarkable failure because it stands in contrast to the typical reliability of digital SLRs.