the hardware itself should last. just make sure that the replacement parts are available on the website and buy some early, i had issues before part availability.

the repairability of the fp4 is awesome. the back comes off with just your fingernail, the battery isnt screwed in, and some of the components most likely to be damaged are easily replaced (assuming stock availability on the website). there’s also a cool crowd called fairphone angels, volunteers that will repair phones for people for free if you trust them enough. i think it’s awesome. fairphone also provides all the design schematics if that’s important to you. as an ethical thing, it’s important to me.

fairphone support also seem really down-to-earth from my experience with them in case you have any issues.

of course, the hardware will likely last. if the specs are enough for you, then it’s not a bad phone at all. like i said above, fairphone have an awful track record with software updates and misleading advertising so this should be a concern if you are conscious about security.