putting the helmet shit to rest:
replace it when you feel it won't protect your head anymore.
if you think that's 3-5 years, buy a new one in 3-5 years
if you think it's good until you crash, wait until you crash
now shut the fuck up and post motorcycles, not helmets.

Me personally? I buy clearance helmets and wear them until I want a new one. I bought a new old stock 2011 helmet in 2015 and still wear it today. I'm poor as shit, no chance I'm shelling out almost a grand every 5 years