In just short of 60 years of fishing, the number of rods I've actually 'broken' can be counted on the fingers of one hand (well, maybe add a finger or two from the other). With one notable exception every one was broken due to 'operator error.'
The 'exception' was a true "WHAT THE HELL JUST HAPPENED??!!
" Rod just exploded right below (not directly adjacent to) the mid Ferrel on a 4 piece rod. Blank just exploded on a forward cast. At some point did the blank get a hard knock that cracked the graphite? Who knows .. but Sage repaired the rod (new rod section) so was good to go in about 30'ish days.