My backhoe attachment is about 34 years old and I am replacing hoses as they fail. I think one looked like it had been replaced before I got it, the rest look original. Failure rate is about 1 per year and I use the backhoe a few times a year. Sometimes just quick jobs and sometimes digging ditch for a few days. I get the hoses made locally for less than I can buy them from Kubota and I don't have to wait a week+ to get it. Unfortunately not many of the hoses are standard lengths available pre-made online.
I did buy a set of control-end replacement hoses for the FEL from Surplus Center, mainly because the economics of ordering standard length pre-made hoses at once was much better than ordering a bunch of standard length pre-made hoses individually. The standard length pre-made stuff is much cheaper online than getting it made locally. The control-end hoses have a loop in them and all are slowly cracking so I figured I would need them sooner rather than later as one had already failed. The cylinder-end all look fine.