Well, 5 yrs is 60K mi, and that's how many miles I have on these OEM hoses despite them being only 3 yrs old. I do live in So. AZ, so it does get pretty hot here, plus I'm running a LCE header. Maybe the heat deteriorates the hoses faster?

'86 4Runner: ARB winchbar, Kaymar, e-codes, OME lift, RR diff lock, FR truetrac, sound stream a/d/s audio, recaros.
'03 LX470: ARB sahara bar, Kaymar, HID's, ART cryo'd/slotted rotors, Stoptech SS hoses.
'01 Prelude SH
'00 CRV