I have replaced various modules on my FP2 which allowed me to use the phone for a longer period of time. Now, you may assume, such hardware would’ve never gone broken on another phone. Yeah, well, that isn’t according to my experience with smartphones in the '00s and '10s or electronics in general. I do agree with the argument that the orig. cameras weren’t very good, which evens out for the ability to replace them. However, in the same regard, at some point cameras are “good enough”; I believe we’ve reached that, as flagship devices are no longer desired for.
I had my washing machine get broken the other day. Repairman said “yeah, those are known to break after 7 years”. Is that sustainable? It is actually quite a complex discussion wrt the question if you want to repair such or replace. Because for some devices, they’ve become clearly less durable, but OTOH they’re better in other regards. For example, if you consider the energy labels then A+++ is a big step forward from A+.